WO2006080378A1 - ベントピース及び前記ベントピースが装着された金型 - Google Patents
ベントピース及び前記ベントピースが装着された金型 Download PDFInfo
- Publication number
- WO2006080378A1 WO2006080378A1 PCT/JP2006/301193 JP2006301193W WO2006080378A1 WO 2006080378 A1 WO2006080378 A1 WO 2006080378A1 JP 2006301193 W JP2006301193 W JP 2006301193W WO 2006080378 A1 WO2006080378 A1 WO 2006080378A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- vent piece
- side end
- vent
- insertion hole
- Prior art date
Links
Classifications
-
- 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
- B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
-
- 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
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- 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
-
- 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
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0617—Venting devices, e.g. vent plugs or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/11—Magnetic recording head
- Y10T428/115—Magnetic layer composition
Definitions
- the present invention relates to a vent piece for communicating air inside and outside of a mold used for molding a rubber product such as a tire, and for discharging air from the inside of the mold.
- a vent hole for discharging air inside the mold is used to prevent air bubbles from being generated in the molded products.
- a vent hole is formed by forming a small diameter hole communicating with the inside and outside of the mold, and in order to prevent the outflow of the raw material in the mold, a valve body may be provided to open and close the inner opening.
- Patent Document 1 Patent Document 1
- FIG. 5 shows a cross-sectional view of the vent hole disclosed in Patent Document 1.
- the vent hole 101 includes a through hole 103 passing through the inside and the outside of the mold 102 and a central hole 105 of the cylindrical vent piece 104 inserted into an insertion portion (expanded diameter portion) near the inner end of the through hole 103.
- a disc-like valve body 106 for opening and closing the central hole 105 is attached to the inner end of the vent piece 104.
- the vent piece 104 is fixed to the mold 102 by press fitting to the insertion portion, force compression, interference fit utilizing thermal expansion and contraction, adhesion with an adhesive, or the like.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-291615 (Paragraphs 0019 to 0021, FIG. 1) Disclosure of the Invention
- the above-mentioned bent piece is fixed so as not to be easily taken in the wedged portion of the through hole formed in the mold, and when it is forcibly removed, its hole diameter is inserted in the inserted portion. It may cause damage such as growing.
- An object of the present invention is to provide a vent piece which can be easily repaired and replaced without forming a new insertion hole (through hole) in a mold.
- a cylindrical shape is inserted into an insertion hole penetrating a wall surface of a mold to connect the inside and the outside of the mold, and one side end surface located inside the mold Locking means is attached to the valve body for opening and closing the opening of the central hole, and for locking the mold so as to prevent movement to the other side in the inserted state into the insertion hole, and the other side end of the mold from the outside
- a vent piece provided with a nut to be screwed to a part.
- the valve body is attached to one side end face of the cylindrical vent piece, and the one side end face is inserted into the insertion hole of the mold so that the one end face faces the inside of the mold.
- the vent piece can be mounted on the mold by screwing a nut to the other end of the vent lip from the outside.
- the structure of the locking means can be simplified.
- a force that may be suitable may be drilled into the insertion hole from the outside of the mold. In this case, after inserting the insertion hole, rotate the venting piece around its center axis to make the locking means function.
- the countersunk screw shape is a shape that protrudes radially outward and has a taper on the other side surface (axial center side).
- the vent piece when the nut is tightened, the taper of the one side end of the countersunk screw is pressed into the mortar-like recess around the insertion hole, so the vent piece has a smaller diameter than the insertion hole. While making it easy to set and insert, it is possible to close the gap where the raw material of the molded product flows out between the mold and the vent piece.
- the locking means besides forming the one side end of the vent piece in the form of a countersunk screw, a disc-like flange is formed at the one side end, or the entire vent piece has a truncated cone shape. What is formed in can be illustrated.
- the size of the one side end of the countersunk screw is set such that the one side end face of the vent piece projects inward from the inner surface of the mold in the state of fitting to the recess of the mold. That's good.
- the boundary between the other side of the one side end of the vent piece and the inner surface of the mold forms the boundary between the vent piece and the mold, and this boundary opens when the vent piece is pulled out. Even if it gets clogged, it is not difficult to withdraw the vent piece.
- a shallow recess can be formed in the molded product by slightly projecting the end face of the vent pin, the appearance of the molded product can be made beautiful.
- the vent piece is configured such that a tubular connection sleeve is connected to the other end of the vent piece main body including one side end, and a nut is screwed on the connection sleeve. Then, by adjusting the length of the connecting sleeve, the entire length of the vent piece can be made to correspond to the different wall thickness for each part of the mold. In addition, since there is no one side end portion of the countersunk screw, the connecting sleeve is easier to manufacture as soon as it is manufactured than the vent piece main body and its length can be easily adjusted.
- a positioning recess for positioning the valve body is formed on one side end face, and the bottom of the positioning recess is formed in a substantially conical shape with the center protruding to one side, and the valve is spotted on the bottom surface. Attach by welding. Then, in addition to the inclination of the bottom surface of the positioning recess, the valve body can be set to an open state at a predetermined angle by welding distortion due to spot welding.
- the vent piece is mounted in the insertion hole of the mold using the locking means (one end portion like a countersunk screw) and the nut. Attach and remove the nut By doing this, the vent piece can be easily attached and detached without damaging the insertion hole of the mold. This reduces costs because the vent pieces can be easily repaired or replaced. In addition, when repairing or replacing the vent piece, the life of the mold can be extended without the need to form a new insertion hole in the mold.
- FIG. 1 A perspective view of a vent piece according to the present invention
- FIG. 2 Axial sectional view of the vent piece mounted on the mold
- FIG. 1 is a perspective view of a vent piece according to the present invention
- FIG. 2 is an axial sectional view of the bent piece mounted on a mold
- FIG. 3 is an axial cross-sectional view of the vent piece main body, where (a) is a cross-sectional view of the whole and (b) is an enlarged cross-sectional view near one side end.
- the vent piece 1 is for preventing air bubbles from being generated in the molded article such as a tire by discharging the air from the internal force of the mold 2 as well, and an insertion hole penetrating the wall surface of the mold 2 It is inserted into 3 and communicates inside and outside of the mold 2.
- the vent piece 1 is, for example, a cylindrical bent piece main body 4 made of steel, a connection sleeve 5 for adjusting the length connected to the bent piece main body 4 made of steel, for example, and a bent piece made of steel, for example.
- a disc-like valve body 7 for preventing the outflow of the raw material of the molded product 17 into the central hole 6 of the main body 4 and a nut 8 for fixing these to the mold 2 are provided.
- the vent piece body 4, the connection sleeve 5 and the valve body 7 may be made of any material such as stainless steel.
- the vent piece main body 4 is set to a diameter slightly smaller than the insertion hole 3 (for example, a diameter of about 3 mm), and its length is, for example, about 14 mm or 14 mm which is a range that can be machined by an automatic lathe. The length is adjusted according to the hardness of the material as a standard.
- One side end 9 of the vent piece body 4 protrudes radially outward (for example, about 4 mm in diameter) and has a taper on the other side (for example, an inclination angle of 45 ° with respect to the central axis direction) It is formed in a countersunk screw shape, and is a locking means that is locked to the inner surface of the mold 2 to prevent movement to the other side of the vent piece 1 (outside of the mold 2).
- the diameter, thickness and taper angle of one side end 9 may be adjusted according to the hardness of the material of the vent piece body 4.
- One end portion 9 is formed around the inner opening of insertion hole 3 when inserted into insertion hole 3. It is fitted in the formed bowl-shaped recess 10.
- the recess 10 is formed, for example, by cutting together with the insertion hole 3, and one side end face of the one side end 9 fitted to this protrudes by D1 (for example, 0.1 mm or less) inward from the inner surface of the mold 2. Is set to the desired size. As a result, a shallow recess is formed on the surface of the molded product 17 and the appearance of the molded product 17 becomes more beautiful.
- a circular positioning recess 11 for positioning the valve body 7 is formed on one end surface of the vent piece main body 4, and a part of the vicinity of the peripheral edge of the valve body 7 is formed on the bottom surface of the positioning recess 11. Are spot-welded so that the valve body 7 opens and closes the inner opening of the central hole 6 of the vent piece body 4.
- the bottom surface of the positioning recess 11 is substantially in the shape of a truncated cone with the center protruding to one side, and the inclination and the welding deformation at the time of spot welding lift the vicinity of the opposite peripheral edge of the valve body 7.
- the valve body 7 is set to an open state at a desired opening degree corresponding to the hardness of the raw material of the molded article 17.
- the size of the positioning recess 11 is set to be smaller than the one side end 9 and larger than the central hole 6 (for example, about 0.6 mm in diameter) (for example, about 2.5 mm in diameter). Further, the depth of the positioning recess 11 can be hooked on the peripheral edge of the valve body 7 and is set to a depth (D2, for example, about 0.35 mm) at which the valve body 7 in the open state can be accommodated.
- the inclination angle of the bottom of the positioning recess 11 is set, for example, in the range of 85 ° to 90 ° with respect to the axial direction.
- the valve body 7 has a diameter larger than that of the central hole 6 and slightly smaller than that of the positioning recess 11 (for example, a diameter of about 2.4 mm).
- the maximum distance (D3) between the valve body 7 and the bottom surface is set, for example, in the range of 0.15 mm to 0.25 mm, and the air is discharged from the inside of the mold 2 while the raw material of the molded product 17 flows out. To stop.
- connection sleeve 5 is to be connected to the vent piece main body 4 by screwing!
- connection sleeve 5 is, for example, in a cylindrical shape having an outer diameter of about 3 mm and a central hole of about 0.8 mm, and the outer diameter of one end 13 thereof is the same as that of the other end 12 of the vent piece body 4. It is smaller in diameter than other parts so as to be screwed into the central hole 6.
- the length of the connection sleeve 5 is connected to the vent piece main body 4 and inserted into the insertion hole 3, and the other end 14 is open on the outside of the insertion hole 3. It is adjusted according to the thickness of the mold 2 so as to protrude into a circular recess 15 formed around the mouth.
- a nut 8 is screwed from the outside of the mold 2 to the other end 14 of the connection sleeve 5 protruding into the recess 15 to lock one side end 9 of the vent piece main body 4 to the mold 2 And by tightening the nut 8, the vent piece 1 is fixed to the mold 2.
- the nut 8 is a thin-walled round nut, and the groove 16 for the driver is formed on the other side, thereby making the recess 15 as small as possible compared to the case where a normal hexagonal nut is used. .
- the shape of the nut 8 is not particularly limited. For example, a special nut obtained by cutting a hexagonal or other suitable shape is adopted for the inner hole, and a jig may be inserted into the inner hole for removal. Oh.
- connection sleeve 5 is connected to the vent piece main body 4 by screwing one end 13 of the connection sleeve 5 to the other end 12 of the vent piece main body 4. Insert the other end 14 of the connection sleeve 5 into the insertion hole 3 of the mold 2 so as to open the inner opening force thereof, and push the vent piece body 4 and the connection sleeve 5 in the other direction.
- One end 9 of the vent piece body 4 is fitted in the recess 10 around the inner opening of the insertion hole 3, and the vent piece 1 is positioned in the axial direction and the direction perpendicular to the axis.
- connection sleeve 5 is set to a length corresponding to the thickness of the mold 2 at the part where the vent piece 1 is to be mounted, and the other end 14 of the connection sleeve 5 is around the outer opening of the insertion hole 3 Make it project in the recess 15 of Screw the nut 8 to the other end 14 and tighten it with a screwdriver to hold the vent piece 1 in the mold 2 and fix it in place.
- FIG. 4 is a cross-sectional view of a mold equipped with a vent piece.
- the mold 2 is used for molding of a tire, and for example, a ring-shaped sector 18 made of steel and a side surface of the tire for molding the circumferential surface of the tire.
- the upper and lower side plates 19a and 19b made of steel and having a force are formed, and assembled so that the upper side plate 19a and the lower side plate 19b are fitted in the central hole of the sector 18.
- the mold 2 may be made of any material other than steel, such as stainless steel! ,.
- longitudinal ribs 20 and transverse ribs 21 for forming longitudinal and lateral grooves of the tire are formed.
- a plurality of penetration holes 3 are formed in each of the sectors 18 where the longitudinal ribs 20 and the transverse ribs 21 do not interfere, and the upper and lower side plates 19a and 19b, and a vent piece 1 in each penetration hole 3 Is attached.
- the green rubber (green tire) and the bladder (not shown) as raw materials are placed inside and the mold 2 is assembled, and the green rubber heated and pressurized from the inside with the bladder is pressed against the inner surface of the mold 2.
- the tire is molded.
- the vent piece 1 discharges the air between the inner surface of the mold 2 and the raw rubber to prevent the formation of air bubble defects in the tire.
- the raw rubber presses the valve body 7 so that the valve body 7 closes the inner opening of the central hole 6 of the vent piece main body 4 and the raw rubber flows out to the central hole 6. To stop. Thereby, a good tire without bubble defects and incense-like projections is formed.
- the mold 2 may be of any type such as molding an air suspension which is not limited to molding a tire.
- the material to be molded may be anything other than rubber, such as synthetic resin and metal.
- the length of the vent piece main body 4 which does not provide the connection sleeve 5 may be changed in accordance with the thickness of the mold 2. Instead of making one side of the vent piece main body 4 project inward rather than the inner surface of the mold 2, a low convex portion is formed on the surface of the molded product 17 Let's get a different look for article 17!
- the vent piece according to the present invention is attached to a mold so as to discharge air from the inside of the mold to prevent air bubbles from occurring when molding rubber products such as tires, and communicate inside and outside. It can be used as a thing.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007500559A JP4733106B2 (ja) | 2005-01-28 | 2006-01-26 | ベントピース及び前記ベントピースが装着された金型 |
US11/795,878 US7654817B2 (en) | 2005-01-28 | 2006-01-26 | Vent piece |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005021653 | 2005-01-28 | ||
JP2005-021653 | 2005-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006080378A1 true WO2006080378A1 (ja) | 2006-08-03 |
Family
ID=36740405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/301193 WO2006080378A1 (ja) | 2005-01-28 | 2006-01-26 | ベントピース及び前記ベントピースが装着された金型 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7654817B2 (ja) |
JP (1) | JP4733106B2 (ja) |
CN (1) | CN100548607C (ja) |
WO (1) | WO2006080378A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014210356A (ja) * | 2013-04-17 | 2014-11-13 | 東洋ゴム工業株式会社 | タイヤ加硫金型及びそれに用いるタイヤ加硫金型用ベントプラグ |
JP2015193176A (ja) * | 2014-03-31 | 2015-11-05 | 東洋ゴム工業株式会社 | 金型及び空気入りタイヤの製造方法 |
JP2017065233A (ja) * | 2015-10-02 | 2017-04-06 | 東洋ゴム工業株式会社 | タイヤ加硫用金型及びタイヤ製造方法 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7842220B2 (en) * | 2007-11-09 | 2010-11-30 | Bridgestone Sports Co., Ltd. | Mold for forming golf ball and golf ball manufactured using the same |
JP4709882B2 (ja) * | 2008-09-24 | 2011-06-29 | 住友ゴム工業株式会社 | タイヤ用モールド |
DE102009031453A1 (de) * | 2009-07-02 | 2011-01-05 | Werner Beuerlein | Gussform mit Entlüfter |
CN102019660A (zh) * | 2009-09-17 | 2011-04-20 | 汉达精密电子(昆山)有限公司 | 消除塑料产品外观结合线的溢料机构 |
CN103072234A (zh) * | 2011-10-25 | 2013-05-01 | 中国石油化工股份有限公司 | 一种排气构件和模具 |
JP6706492B2 (ja) * | 2015-12-03 | 2020-06-10 | Toyo Tire株式会社 | タイヤ加硫金型及びタイヤの製造方法 |
JP6663705B2 (ja) * | 2015-12-16 | 2020-03-13 | Toyo Tire株式会社 | タイヤモールド |
JP6646434B2 (ja) * | 2015-12-21 | 2020-02-14 | Toyo Tire株式会社 | タイヤ加硫成型金型 |
JP2020001336A (ja) * | 2018-06-29 | 2020-01-09 | Toyo Tire株式会社 | タイヤ加硫金型用ベントスリーブ及びタイヤ加硫金型 |
CN111546544B (zh) * | 2020-05-14 | 2022-07-01 | 绍兴正昕智能科技股份有限公司 | 排气套、轮胎硫化模具、轮胎制造方法及轮胎 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4740145A (en) * | 1987-07-15 | 1988-04-26 | The Firestone Tire & Rubber Company | Flash-free vented tire mold |
JPH0197910U (ja) * | 1987-12-18 | 1989-06-29 | ||
JP2004291615A (ja) * | 2003-03-11 | 2004-10-21 | Goda Tekkosho:Kk | 金型エア抜き構造 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62193039A (ja) | 1986-02-20 | 1987-08-24 | Matsushita Electric Ind Co Ltd | 陰極線管遮蔽装置 |
JPH0197910A (ja) * | 1987-10-09 | 1989-04-17 | Konica Corp | フォーカスレンズの焦点位置制御方法 |
DE19543276C1 (de) * | 1995-11-20 | 1997-02-06 | Continental Ag | Reifenvulkanisationsform mit Entlüftung |
GB9623770D0 (en) * | 1996-11-15 | 1997-01-08 | Sp Tyres Uk Ltd | Mould vents |
JP3589644B2 (ja) * | 2000-12-07 | 2004-11-17 | 日本碍子株式会社 | タイヤ成形用金型 |
JP3717895B2 (ja) * | 2002-07-04 | 2005-11-16 | 韓国タイヤ株式会社 | タイヤ加硫金型のベント装置 |
JP2004064512A (ja) * | 2002-07-30 | 2004-02-26 | Sony Corp | 欠陥画素の検出方法および装置、並びに撮像装置 |
-
2006
- 2006-01-26 JP JP2007500559A patent/JP4733106B2/ja not_active Expired - Fee Related
- 2006-01-26 US US11/795,878 patent/US7654817B2/en not_active Expired - Fee Related
- 2006-01-26 CN CN200680002915.XA patent/CN100548607C/zh not_active Expired - Fee Related
- 2006-01-26 WO PCT/JP2006/301193 patent/WO2006080378A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4740145A (en) * | 1987-07-15 | 1988-04-26 | The Firestone Tire & Rubber Company | Flash-free vented tire mold |
JPH0197910U (ja) * | 1987-12-18 | 1989-06-29 | ||
JP2004291615A (ja) * | 2003-03-11 | 2004-10-21 | Goda Tekkosho:Kk | 金型エア抜き構造 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014210356A (ja) * | 2013-04-17 | 2014-11-13 | 東洋ゴム工業株式会社 | タイヤ加硫金型及びそれに用いるタイヤ加硫金型用ベントプラグ |
JP2015193176A (ja) * | 2014-03-31 | 2015-11-05 | 東洋ゴム工業株式会社 | 金型及び空気入りタイヤの製造方法 |
JP2017065233A (ja) * | 2015-10-02 | 2017-04-06 | 東洋ゴム工業株式会社 | タイヤ加硫用金型及びタイヤ製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006080378A1 (ja) | 2008-06-19 |
US20080258037A1 (en) | 2008-10-23 |
US7654817B2 (en) | 2010-02-02 |
JP4733106B2 (ja) | 2011-07-27 |
CN101107112A (zh) | 2008-01-16 |
CN100548607C (zh) | 2009-10-14 |
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