CN102149490A - Method of manufacturing casting for mold for molding tire - Google Patents
Method of manufacturing casting for mold for molding tire Download PDFInfo
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- CN102149490A CN102149490A CN2009801356881A CN200980135688A CN102149490A CN 102149490 A CN102149490 A CN 102149490A CN 2009801356881 A CN2009801356881 A CN 2009801356881A CN 200980135688 A CN200980135688 A CN 200980135688A CN 102149490 A CN102149490 A CN 102149490A
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- liquation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
A method of manufacturing a casting for a mold for molding a tire, wherein the casting is less likely to twist or deform when the casting shrinks, upper and lower molds of a sectional mold have a small difference between the degrees of shrinkage, the casting, even if large-sized, can be produced in a relatively short molten metal solidifying time, and the method can easily produce healthy castings. A method of manufacturing a casting for a mold which is adapted for molding a tire and is of sectional type in which the mold is circumferentially divided to allow opening and closing operation of the mold, wherein the method includes a step of separately molding and producing divided individual block castings (1). In this step, molten metal is poured in the mold in which cooling metal, which continuously surrounds at least an aesthetically designed surface (6) which is a contact surface making contact with the mold, is provided on four surfaces which are an upper surface section (2a), a lower surface section (2b), and circumferentially divided surfaces (3a, 3b) on both sides of the upper and lower surfaces, and the four surfaces surround the aesthetically designed surface (6) from four directions.
Description
Technical field
The present invention relates to the manufacture method of the tire forming mold of a kind of composite die (sectional mold) formula with foundry goods, specifically, relate to a kind of distortion, buckling deformation that is difficult to take place each block casting part when shrinking of casting, and contraction rate variance up and down is less, even large-sized object can realize that also the liquation setting time is shorter, and be easy to obtain the manufacture method of the tire forming mold of complete foundry goods with foundry goods.
Background technology
Because tire forming mold has following characteristic, the thin plate of the siping that promptly design is complicated, insert casting is made of the different kinds of metals material, scraper plate (blade) etc., therefore utilize casting method to make usually, extensively adopt the plaster mould casting method as the tire-mold casting method.The reason of other of employing plaster mould casting method can be listed below:
(1) can make foundry goods in high dimensional accuracy ground with the fusing point that reaches the aluminium alloy degree, (2) can easily carry out cutting processing, assembling in the gypsum mold stage, (3) can also high-freedom degree ground the insert casting of reply siping, scraper plate, (4) pouring into a mould from rubber mold the process of turning over molded work, can critically duplicate complicated design shape etc.
The mould of tire-mold is cut apart structure and is existed along tire width direction and be divided into two-part two moulds and circumferentially be divided into these two kinds of the composite dies of 7～11 parts along tire.In above-mentioned two kinds of structures, the composite die that the resistance when extensively adopting the tire building demoulding is little and dimensional accuracy is high.As the casting method of composite die, for example in patent documentation 1, disclose in the method utilizing gravitational casting and use the cast liquation of special-purpose runner (shoot) of disclosing in the method, patent documentation 2 of the cast liquation that utilizes low pressure casting method, the patent documentation 3 and disclose the method for utilizing gravitational casting and using the cast liquation that waters platform where rites are performed (runner-board) that can use repeatedly.
The feature of said method can be listed below etc.: (1) is after casting; process and the amalgamation modelling, (2) are because the liquation outlet concentrates on following side, therefore in a unit of composite die; liquation setting time difference up and down, (3) can effectively utilize mold cavity as cold mould.
Figure 19 illustrates the operation example when utilizing composite die to make tire-mold.(A) be the vertical view of the ring-type foundry goods 100 of tire-mold, (B) be the cutaway view of ring-type foundry goods 100.In this operation example, at first, the casting tire-mold then is divided into each block casting part 101 by fan-segmentation, processes periphery then and makes its amalgamation modelling.According to this method, the block casting part that can cast the ring of a plurality of block casting parts simultaneously and cast a unit.
Patent documentation 1: Japanese kokai publication sho 57-58968 communique (claims etc.)
Patent documentation 2: No. 2796010 (claims etc.) of Japan's special permission
Patent documentation 3: TOHKEMY 2007-144480 communique (claims etc.)
Utilize composite die casting tire-mold to have following advantage, on the block casting part of composite die, be difficult for being distorted when promptly casting is shunk, buckling deformation, tire-mold can be become a ring with cast casting, so cast the productibility height with the situation of foundry goods.But, in composite die in the past, because the liquation outlet is present in following or upper face side, therefore in top and bottom liquation setting time difference appears, and slow place casting contraction is big solidifying, the such problem of difference takes place in the size of mould easily and exist up and down.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of distortion, buckling deformation that is difficult for taking place each block casting part when shrinking of casting, and contraction rate variance up and down is less, even large-sized object can realize that also the liquation setting time is shorter, and be easy to obtain the manufacture method of the tire forming mold of complete foundry goods with foundry goods.
In order to solve above-mentioned problem, the inventor has carried out wholwe-hearted research, found that by adopting following structure to achieve the above object, thereby finishes the present invention.
That is, the invention provides the manufacture method of a kind of tire forming mold with foundry goods, this tire forming mold foundry goods is by along circumferentially being divided into the amalgamation pattern tire forming mold foundry goods that a plurality of parts are carried out the on-off action of mould, it is characterized in that,
This manufacture method comprises individually the operation of casting, making divided each block casting part, in this operation, it is characterized in that, to mold cast liquation, this mold disposes cold mould in the mode of surrounding above-mentioned appearance at least continuously on these four faces of circumferential divisional plane of facial on make to the appearance of the contact-making surface that contacts with mould all around, lower face and both sides.
In the present invention, on these four faces of circumferential divisional plane of preferably facial above-mentioned, lower face and both sides, the mode that is mutually symmetrical with relative above-mentioned cold mould disposes above-mentioned cold mould.In addition, preferred pin is configured in above-mentioned going up on face and the above-mentioned lower face symmetrically to a pair of liquation outlet of above-mentioned mold, and perhaps a pair of liquation outlet at above-mentioned mold is configured on the circumferential divisional plane of above-mentioned both sides symmetrically.And preferred liquation exports and/or is formed on to the running channel (runner) of liquation outlet supply liquation the inside of above-mentioned cold mould.
Adopt the present invention, a kind of distortion, buckling deformation that is difficult for taking place each block casting part when shrinking of casting can be provided, and contraction rate variance up and down is less, even large-sized object can realize that also the liquation setting time is shorter, and be easy to obtain the manufacture method of the tire forming mold of complete foundry goods with foundry goods.
Description of drawings
Fig. 1 is the perspective elevation of the block casting part of expression one embodiment of the present invention.
Fig. 2 is the perspective elevation of the block casting part of expression other embodiments of the present invention.
Fig. 3 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 4 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 5 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 6 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 7 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 8 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Fig. 9 is the perspective elevation of the tire forming mold of other embodiments of the present invention with the manufacture method of foundry goods.
Figure 10 is the perspective elevation of the manufacture method of expression embodiment 1.
Figure 11 is the perspective elevation of the manufacture method of expression embodiment 2.
Figure 12 is the perspective elevation of the manufacture method of expression embodiment 3.
Figure 13 is the perspective elevation of the manufacture method of expression comparative example 1.
Figure 14 is the perspective elevation of the manufacture method of expression comparative example 2.
Figure 15 is the key diagram that chord size is measured.
Figure 16 is the key diagram of distortion measurement.
Figure 17 is the key diagram of circumferential warpage.
Figure 18 is the key diagram of width warpage.
Figure 19 utilizes composite die to make the process chart of tire-mold in method in the past.
The specific embodiment
Below, utilize accompanying drawing to explain embodiments of the present invention.
The 1st～3 embodiment
(A) of Fig. 1 is the perspective elevation of the block casting part 1 of the 1st embodiment of the present invention.Appearance 6 sides of the facial 2a back side 4 sides back side 4 sides back side 4 sides of the circumferential divisional plane 3b of demifacet and opposite side roughly on the demifacet roughly of the circumferential divisional plane 3a of the side in the circumferential divisional plane of demifacet, both sides roughly of demifacet, lower face 2b roughly on block casting part 1, configuration are used to improve the cold mould of the cooling velocity of block casting part 1 inside.Utilize oblique line to represent position with cold mould butt among the figure.In the present invention, important part is, the mode of surrounding appearance 6 continuously with cold mould like that forms mold as shown.Thus, when the liquation after casting solidified, solidifying promptly of this position carried out, and cakey this position is played a role as the restraint appliance that solidifies, cools off when shrinking of the integral body of block casting part 1.As a result, the distortion of for manufactured block casting part 1, be difficult for being distorted, warpage is such, and also the contraction rate variance of going up facial 2a and lower face 2b diminishes.
In addition; if utilize composite die ring-type casting tire-mold in the past as shown in figure 19; then form the oral pore portion of emitting on a certain side in portion or the lower face in the above; and owing to upwards do not have divisional plane in week; so cold mould is contacted with circumferential divisional plane, can't form mold in the mode that cold mould surrounds appearance continuously thus.Therefore, though the situation of composite die in the past makes the ring-shaped structure of foundry goods from the distortion when shrinking, the generation minimization of buckling deformation, emit solidifying of oral-lateral slower, and can't avoid the contraction rate variance of facial and lower face to become big.
In the present invention, the configuration with block casting part 1 corresponding cold mould as the back side 4 sides of the opposite face of appearance 6 is not particularly limited, outside the hole portion of remove feeder 5 whole contacted with cold mould, perhaps also can not dispose cold mould fully, and only adopt mold cavity.
(B) of Fig. 1 is the perspective elevation of the block casting part 1 of the 2nd embodiment of the present invention.Appearance 6 sides of the circumferential divisional plane 3a of the side on block casting part 1 among whole of facial 2a, whole of lower face 2b, the circumferential divisional plane of the both sides roughly back side 4 sides of the circumferential divisional plane 3b of demifacet and opposite side dispose cold mould roughly on the demifacet.In addition, Fig. 1 (C) is the perspective elevation of the block casting part 1 of the 3rd embodiment of the present invention.Appearance 6 sides of facial 2a on the block casting part 1 roughly the back side 4 sides of demifacet, lower face 2b dispose cold mould roughly on circumferential divisional plane 3a, 3b whole of demifacet, both sides.In the above-described embodiment, also can make cold mould surround appearance 6 continuously in the same manner with the 1st embodiment, the result, when the liquation after casting solidifies, solidifying promptly of this position carried out, and cakey this position is played a role as the restraint appliance that solidifies, cools off when shrinking of the integral body of block casting part 1.
The 4th～8 embodiment
In the 4th～8 following embodiment, the preferred implementation that the mode that is mutually symmetrical with relative cold mould is disposed cold mould on these four faces of circumferential divisional plane of face, lower face and both sides on the block casting part 1 describes.
(A) of Fig. 2 is the perspective elevation of the block casting part 1 of the 4th embodiment of the present invention.By the cold mould of configuration on whole of facial 2a on the block casting part 1, whole of lower face 2b, circumferential divisional plane 3a, the 3b of both sides whole, be configured to relative cold mould and be mutually symmetrical.
(B) of Fig. 2 is the perspective elevation of the block casting part 1 of the 5th embodiment of the present invention.By at appearance 6 sides of facial 2a on the block casting part 1 appearance 6 sides appearance 6 sides cold mould of configuration on the demifacet roughly of circumferential divisional plane 3a, the 3b of demifacet, both sides roughly of demifacet, lower face 2b roughly, be configured to relative cold mould and be mutually symmetrical.
(C) of Fig. 2 is the perspective elevation of the block casting part 1 of the 6th embodiment of the present invention.By at the back side of facial 2a on the block casting part 14 sides back side 4 sides back side 4 sides cold mould of configuration on the demifacet roughly of circumferential divisional plane 3a, the 3b of demifacet, both sides roughly of demifacet, lower face 2b roughly, be configured to relative cold mould and be mutually symmetrical.
(D) of Fig. 2 is the perspective elevation of the block casting part 1 of the 7th embodiment of the present invention.By at appearance 6 sides of facial 2a on the block casting part 1 appearance 6 sides back side 4 sides cold mould of configuration on the demifacet roughly of circumferential divisional plane 3a, the 3b of demifacet, both sides roughly of demifacet, lower face 2b roughly, be configured to relative cold mould and be mutually symmetrical.
(E) of Fig. 2 is the perspective elevation of the block casting part 1 of the 8th embodiment of the present invention.By at the back side of facial 2a on the block casting part 14 sides back side 4 sides appearance 6 sides cold mould of configuration on the demifacet roughly of circumferential divisional plane 3a, the 3b of demifacet, both sides roughly of demifacet, lower face 2b roughly, be configured to relative cold mould and be mutually symmetrical.Wherein, in all figure, all utilize oblique line to represent position with cold mould butt.
In the 4th～8 embodiment, be that cold mould surrounds appearance 6 continuously all, therefore, can obtain the effect identical with the invention of the 1st embodiment.And, in the 4th～8 embodiment, dispose cold mould by the mode that on these four faces of circumferential divisional plane 3a, the 3b of facial 2a, lower face 2b and both sides on the block casting part 1, is mutually symmetrical with relative cold mould, the liquation of circumferential divisional plane 3a, the 3b of facial 2a, lower face 2b and both sides is solidified symmetrically almost begin simultaneously, thereby on block casting part 1, obtain up and down dimensional characteristic of (direction of arrow) symmetry easily.The configuration of the cold mould of the back side 4 sides of foundry goods is not particularly limited.
If want to obtain as described above (direction of arrow) up and down symmetrical solidification morphology of block casting part 1, then must have to rising head 5 is arranged on the back side 4 sides, need make the liquation set retardation of the back side 4 sides of block casting part 1.Therefore and since do not need to utilize overleaf 4 liquation initial stage solidification layer constraint block foundry goods 1 integral body solidify, cool off the effect of shrinking, so there is no need overleaf that 4 sides are provided with cold mould.
The 9th～11 embodiment
In the 9th～11 following embodiment, preferred embodiment describe following, be about to be configured in face and lower face symmetrically, perhaps will export the preferred implementation on the circumferential divisional plane that be configured in both sides symmetrically at a pair of liquation of mold at a pair of liquation outlet of mold.
Fig. 3 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 9th embodiment of the present invention.In illustrated preferred implementation, be configured in a pair of liquation outlet 7 on facial 2a and the lower face 2b symmetrically and be formed on the lower face 2b lateral edge portion of the last facial 2a lateral edge portion of appearance 6 and appearance 6.Utilize gravitation casting method that the liquation of 10 cast from the sprue gate is supplied with to above-mentioned liquation outlet 7 via necking 11 and a running channel 8.
Fig. 4 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 10th embodiment of the present invention.Identical with the 9th embodiment, in illustrated preferred implementation, be configured in a pair of liquation outlet 7 on facial 2a and the lower face 2b symmetrically and be formed on the lower face 2b lateral edge portion of the last facial 2a lateral edge portion of appearance 6 and appearance 6.Utilize gravitation casting method that the liquation of 10 cast from the sprue gate is supplied with to above-mentioned liquation outlet 7 via necking 11 and the running channel 8 that is divided into two-way.
Fig. 5 is the schematic diagram at the configuration of the liquation outlet of the casting mold of block casting part 1 of expression the 11st embodiment of the present invention.In illustrated preferred implementation, be configured in two pairs of liquations outlet 7 on facial 2a and the lower face 2b symmetrically and be respectively formed on the lower face 2b lateral edge portion of the last facial 2a lateral edge portion of appearance 6 and appearance 6.Utilize gravitation casting method that the liquation of 10 cast from the sprue gate is supplied with to above-mentioned liquation outlet 7 via necking 11 and the running channel 8 that is divided into two-way.
In the 9th～11 embodiment, prerequisite all is that cold mould surrounds appearance 6 continuously, therefore, can obtain the effect identical with the invention of the 1st embodiment.And, in the 9th～11 embodiment, can both obtain following advantage, promptly also can in cast certainly begins time till the casting complete, make from liquation input heat (overheated) state of liquation outlet 7 impartial up and down, thereby can on block casting part 1, obtain the dimensional characteristic of symmetry up and down.
The 12nd～15 embodiment
In the 12nd～15 following embodiment, following preferred implementation is described, promptly liquation exports and supplies with the running channel both sides of liquation or the inside that a certain side among their both sides is formed on cold mould 12 to the liquation outlet.
Fig. 6 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 12nd embodiment of the present invention.In illustrated preferred implementation, liquation outlet 7 is formed on the last facial 2a lateral edge portion of appearance 6.Utilize gravitation casting method that the liquation of 10 cast from the sprue gate is supplied with to above-mentioned liquation outlet 7 via necking 11 and a running channel 8.At this, in the 12nd embodiment, liquation outlet 7 is formed on the inside of cold mould 12 in the mode that connects cold mould 12.
Fig. 7 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 13rd embodiment of the present invention.In illustrated preferred implementation, be configured in a pair of liquation outlet 7 on facial 2a and the lower face 2b symmetrically and be formed on the lower face 2b lateral edge portion of the last facial 2a lateral edge portion of appearance 6 and appearance 6.Utilizing gravitation casting method to make from the liquation of a pair of sprue gate 10 cast supplies with to above-mentioned liquation outlet 7 via necking inequality 11 and running channel 8 respectively.At this, in the 13rd embodiment, liquation outlet 7 is formed on the inside of cold mould 12.
In the 12nd, 13 embodiments, prerequisite all is that cold mould 12 surrounds appearance 6 continuously, therefore, can obtain the effect identical with the invention of the 1st embodiment.And, in the above-described embodiment, by liquation outlet 7 is arranged on cold mould 12 inside, can after casting complete, promptly solidify, cool off the liquation of liquation outlet 7, even and under the situation that the outlet of liquation as the 12nd embodiment 7 does not have to dispose symmetrically up and down, also can similarly obtain block casting part 1 and almost solidify, cool off such advantage up and down equably with the 13rd embodiment.
Fig. 8 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 14th embodiment of the present invention.In illustrated preferred implementation, except that running channel 8 is formed on the inside of cold mould 12, other identical with the 12nd embodiment.
Fig. 9 is the schematic diagram at the configuration of the liquation outlet of the mold of block casting part 1 of expression the 15th embodiment of the present invention.In illustrated preferred implementation, be configured in a pair of liquation outlet 7 on facial 2a and the lower face 2b symmetrically and be formed on the lower face 2b lateral edge portion of the last facial 2a lateral edge portion of appearance 6 and appearance 6.Utilize gravitation casting method that the liquation of 10 cast from a sprue gate is supplied with to above-mentioned liquation outlet 7 via necking 11 and the running channel 8 that is divided into two-way.At this, in the 15th embodiment, liquation outlet 7 and running channel 8 both sides are formed on the inside of cold mould 12.
In the 14th, 15 embodiments, can further improve the effect of the invention of the 12nd, 13 above-mentioned embodiments, and also have to save and whenever cast the advantage of having to unload the such work of outer dress liquation mouth.
In addition, the tire forming mold of amalgamation pattern of the present invention has following feature with the manufacture method of foundry goods, promptly comprise individually the operation of casting, making divided each block casting part, for example grand master pattern production process, rubber pattern turn over die process to other operation, gypsum mold turns over die process, mold drying process, divides the operation of die process, matched moulds operation etc. suitably to carry out according to known method.
Embodiment
Below utilize embodiment that the present invention is described in further detail.
Figure 10 is the perspective elevation of casting method of the block casting part 1 of expression embodiment 1.As shown, the mode with continuous encirclement appearance 6 disposes cold mould 12 in the mold cavity of facial 2a, lower face 2b and circumferential divisional plane 3a, these four faces of 3b on block casting part 1.Mold cavity around block casting part 1, running channel 8, liquation outlet 7, cold mould 12 has all used waterglass to solidify the sand mo(u)ld of silica sand system.The cold mould contact area rate that goes up facial 2a is 80%, the cold mould contact area rate of lower face 2b is 50%, and circumferentially the cold mould contact area rate of divisional plane 3a, 3b is 60%, and the temperature of the mold during with casting, mold cavity, cold mould is made as 25 ℃, casting beginning temperature is made as 680 ℃, makes block casting part 1.Wherein, utilize AC4C (aluminium alloy) as the alloy of tire-mold with foundry goods.
Embodiment 2
Figure 11 is the perspective elevation of casting method of the block casting part 1 of expression embodiment 2.As shown, the mode with continuous encirclement appearance 6 disposes cold mould 12 respectively symmetrically in the mold cavity of facial 2a, lower face 2b and circumferential divisional plane 3a, these four faces of 3b on block casting part 1.Mold cavity around block casting part 1, running channel 8, liquation outlet 7, cold mould 12 has all used waterglass to solidify the sand mo(u)ld of silica sand system.The cold mould contact area rate that goes up facial 2a is 50%, the cold mould contact area rate of lower face 2b is 50%, and circumferentially the cold mould contact area rate of divisional plane 3a, 3b is 60%, and the temperature of the mold during with casting, mold cavity, cold mould is made as 25 ℃, casting beginning temperature is made as 680 ℃, makes the block casting part.Wherein, utilize AC4C (aluminium alloy) as the alloy of tire-mold with foundry goods.
Embodiment 3
Figure 12 is the perspective elevation of casting method of the block casting part 1 of expression embodiment 3.As shown in the figure, the mold cavity (counterdie) 13 around last facial 2a, the lower face 2b of block casting part, circumferential divisional plane 3a, 3b, running channel 8, liquation outlet 7, cold mould 12 all adopts Cast Iron Products.The mold cavity (patrix) of block casting part rear side adopts waterglass solidification of silicon article.In addition, running channel 8, liquation outlet 7 have been made in the mode that digs in the structure of below.The cold mould contact area rate of last facial 2a, lower face 2b and circumferential divisional plane 3a, 3b is made as 100%, and the mold during casting and the temperature of mold cavity are made as 200 ℃, and casting beginning temperature is made as 680 ℃, makes the block casting part.Wherein, utilize AC4C (aluminium alloy) as the alloy of tire-mold with foundry goods.
Comparative example 1
Figure 13 is the perspective elevation of the tire-mold of expression comparative example 1 with the casting method in the past of foundry goods.As shown in the figure, on the ring-type running channel 18 of ring downside, be provided with 6 liquation outlets 17 of configuration equably.Being set as follows of cold mould contact area rate: the whole periphery barrel surface of ring-type foundry goods 100%, be about 40% in the following circular inboard of side plane, form rising head 15 on facial 22a be 0% (not contacting) with cold mould.In addition, the mold during with casting and the temperature of mold cavity are made as 200 ℃, and casting beginning temperature is made as 680 ℃, makes the block casting part.Wherein, utilize AC4C (aluminium alloy) as the alloy of tire-mold with foundry goods.
Comparative example 2
Figure 14 is the perspective elevation of casting method of the block casting part 1 of expression comparative example 2.As shown in the figure, two cold moulds 12 on the block casting part, have respectively been disposed in the mold cavity of facial 2a, lower face 2b and circumferential divisional plane 3a, these four faces of 3b.The contact area rate of cold mould 12 all is made as 30%.And the mold during with casting and the temperature of mold cavity are made as 25 ℃, and casting beginning temperature is made as 680 ℃, makes block casting part 1.Wherein, utilize AC4C (aluminium alloy) as the alloy of tire-mold with foundry goods.
As with the forming method of the appearance of the contact-making surface of mould
The wooden model tool that will be formed with tread contour is configured in the mold cavity, and pours into a mould silastic material in mold cavity, carries out the manufacturing of rubber mold thus.The material of wooden model tool adopts synthetic wood, and (basic shrinkage factor is set: 11.5/1000), rubber mold adopts the silicon rubber mould (rubber layer wall thickness 15mm) of band gypsum liner.
By (the Noritake Gypsum of Co., Ltd. system G-1 foaming plaster: mix water rate 70% of pouring gypsum in above-mentioned rubber mold, foaming increment 50%), produce and appearance Φ 600 ± 20mm, tyre width size 195 ± 30mm, casting section thickness 70～100mm the outward appearance face of the mold contact of foundry goods total height 300 ± 30mm, several 9/1 rings of fan-segmentation.Utilize this outward appearance face to cast, obtain the block casting part of embodiment 1～3 and comparative example 2 and the tire-mold foundry goods of comparative example 1.Tire-mold is illustrated in the following table 1 with the basic size and the manufacture method summary thereof of foundry goods.
[table 1]
According to following evaluation method according to chord size, distortion, circumferentially these 4 of warpage and width warpages are estimated with the rough casting dimensional accuracy of foundry goods the tire-mold of making by embodiment 1～3 and comparative example 1,2.
＜chord size 〉
Figure 15 is the key diagram that chord size is measured.Each tire-mold of having obtained with the last chord size of foundry goods, central chord size, chord size is measured down, is calculated separately the average deviation with the accompanying drawing size.And calculate the poor of chord size and following chord size.Wherein, the deviation of the accompanying drawing numerical value of chord size is passed through
Chord size deviation=foundry goods actual, measured dimension-accompanying drawing size
Calculate.The chord size deviation be on the occasion of the time, mean that the foundry goods chord size is bigger than accompanying drawing numerical value.In addition, the difference between is up and down passed through
Poor=following chord size up and down-last chord size
Calculate.Difference up and down be on the occasion of the time, mean that the size of patrix is less.
＜distortion 〉
Figure 16 represents the key diagram of distortion measurement.By the roundness measurement of rough casting, calculate near (the residual quantity value of A～D) of the 4 points both ends up and down of block casting part with respect to theoretical size.With the total of the absolute value of the residual quantity value that obtains (|+A|+|-B|+|-C|+|+D|) as twist angle, the size of distortion is estimated.
＜circumferential warpage 〉
Figure 17 is the key diagram that circumferential warpage is measured.By roundness measurement, calculate circumferential concavo-convex amount (X, Y) with respect to theoretical size at a secter pat, and to the circumferential skewing amount=-X or circumferential skewing amount=+ Y estimates.
＜width warpage 〉
Figure 18 is the key diagram that the width warpage is measured.By width R shape measure, calculate the concavo-convex amount with respect to theoretical size (X, Y) at the width of a secter pat, and to the width amount of warpage=-X or width amount of bow=+ Y estimates.
The result's summary that obtains is illustrated in the table 2.
[table 2]
As shown in Table 2, for comparative example 1 (ring-type casting in the past), distortion, circumferential warpage, width warping characteristic good (mean value, deviation are all less), but the difference of the chord size up and down is maximum.In addition, for comparative example 2 (block casting part in the past), the chord size difference between is less up and down, but distortion, circumferentially warpage, width warping characteristic are bad.
On the other hand, can suppress embodiment 1 and little than comparative example 1 of the chord size difference that makes embodiment 1, and, compare distortion, the buckling deformation of further inhibition embodiment 1 with comparative example 2.That is, be difficult for being distorted, buckling deformation the piece casting that the contraction rate variance between the upper and lower mould of composite die is less in the time of can providing a kind of casting to shrink as can be known.In addition, with embodiment 1 up and down between the chord size difference compare, can further suppress embodiment 2 up and down between chord size poor.In addition, in embodiment 3,, poor with the chord size that the ring-type casting is compared between can improving up and down significantly though distortion/warpage is identical with ring-type casting degree.
As known from the above, adopt the present invention,, also can access and ring-type casting method equal extent or higher dimensional accuracy characteristic even utilize the piece casting, can the maximum limit performance as the height of the corresponding free degree of large-sized object of the advantage of piece casting.
Description of reference numerals
1,101, block casting part; 2a, 22a, upper face; 2b, lower face; 3a, 3b, circumferential divisional plane; 4, the back side; 5,15, rising head; 6, appearance; 7,17, liquation outlet; 8,18, running channel; 10, sprue gate; 11, necking; 12, cold mould; 13, counterdie; 100, ring-type foundry goods.
Claims (5)
1. a tire forming mold is with the manufacture method of foundry goods, and this tire forming mold foundry goods is by the mould edge circumferentially being divided into the amalgamation pattern tire forming mold foundry goods that a plurality of parts are carried out the on-off action of this mould, it is characterized in that,
This manufacture method comprises individually the operation of casting, making divided each block casting part, in this operation, to mold cast liquation, this mold disposes cold mould in the mode of surrounding above-mentioned appearance at least continuously on these four faces of circumferential divisional plane of face on make to the appearance of the contact-making surface that contact with mould all around, lower face and both sides.
2. the tire forming mold according to claim 1 manufacture method of foundry goods, wherein,
On these four faces of circumferential divisional plane of facial above-mentioned, lower face and both sides, the mode that is mutually symmetrical with relative above-mentioned cold mould disposes above-mentioned cold mould.
3. the tire forming mold according to claim 1 manufacture method of foundry goods, wherein,
A pair of liquation outlet at above-mentioned mold is configured in above-mentioned going up on face and the above-mentioned lower face symmetrically.
4. the tire forming mold according to claim 1 manufacture method of foundry goods, wherein,
A pair of liquation outlet at above-mentioned mold is configured on the circumferential divisional plane of above-mentioned both sides symmetrically.
5. the tire forming mold according to claim 1 manufacture method of foundry goods, wherein,
Liquation exports and/or is formed on to the running channel of liquation outlet supply liquation the inside of above-mentioned cold mould.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008233981A JP5243157B2 (en) | 2008-09-11 | 2008-09-11 | Manufacturing method of casting for tire mold |
| JP2008-233981 | 2008-09-11 | ||
| PCT/JP2009/060904 WO2010029802A1 (en) | 2008-09-11 | 2009-06-15 | Method of manufacturing casting for mold for molding tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102149490A true CN102149490A (en) | 2011-08-10 |
Family
ID=42005064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801356881A Pending CN102149490A (en) | 2008-09-11 | 2009-06-15 | Method of manufacturing casting for mold for molding tire |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110174460A1 (en) |
| EP (1) | EP2335844B1 (en) |
| JP (1) | JP5243157B2 (en) |
| CN (1) | CN102149490A (en) |
| WO (1) | WO2010029802A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228803A (en) * | 2013-05-20 | 2016-01-06 | 株式会社普利司通 | The manufacture method of tire building mould and tire building mould |
| CN105268949A (en) * | 2014-06-05 | 2016-01-27 | 住友橡胶工业株式会社 | Fragment casting method and casting equipment |
| CN110612171A (en) * | 2017-05-09 | 2019-12-24 | 株式会社普利司通 | Method for manufacturing tire molding die |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5427589B2 (en) * | 2009-12-22 | 2014-02-26 | 株式会社ブリヂストン | Manufacturing method of tire mold |
| CN103551514B (en) * | 2013-11-14 | 2015-07-08 | 沈阳工业大学 | Dead head heating easily-cutting piece of large steel casting |
| JP7415884B2 (en) * | 2020-11-12 | 2024-01-17 | トヨタ自動車株式会社 | Casting equipment and casting method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2086015A (en) * | 1936-01-10 | 1937-07-06 | Harry A Morgan | Inkwell mounting |
| FR2287294A1 (en) * | 1974-10-09 | 1976-05-07 | Peugeot & Renault | LOW PRESSURE FOUNDRY PARTS PERFECTIONING |
| US4129406A (en) * | 1975-11-25 | 1978-12-12 | Cima Costruzioni Industriali Metalmeccaniche E Affini S.A.S. Di Capecchi Floriano & C. | Mold for the vulcanization or retreading of vehicle tires |
| DE2831219C2 (en) * | 1978-07-15 | 1984-03-15 | Maschinenbau HERBERT KG, 6000 Frankfurt | Molding segment, in particular for tire vulcanizing molds and processes for its production |
| JPS5911383B2 (en) | 1980-09-27 | 1984-03-15 | 橋場鉄工株式会社 | Low-pressure casting mold for tire molding and vulcanization |
| US4714102A (en) * | 1986-01-11 | 1987-12-22 | Toshiba Machine Co., Ltd. | Casting method and an apparatus therefor |
| JPH078406B2 (en) * | 1989-02-23 | 1995-02-01 | 株式会社ブリヂストン | Split mold for tire segment small segment casting |
| JP2796010B2 (en) | 1992-04-22 | 1998-09-10 | 日本碍子株式会社 | Tire mold casting method and tire mold casting chute |
| JP3606411B2 (en) * | 1996-07-10 | 2005-01-05 | 株式会社ブリヂストン | Tire vulcanization mold and manufacturing method thereof |
| SE513287C2 (en) * | 1998-11-06 | 2000-08-21 | Volvo Lastvagnar Ab | Method and apparatus for mold casting |
| JP2006315065A (en) * | 2005-05-16 | 2006-11-24 | Yokohama Rubber Co Ltd:The | Method for producing die for tire molding, and casting die used for the production method |
| JP4789241B2 (en) | 2005-11-29 | 2011-10-12 | 日本碍子株式会社 | Tire mold casting method |
| JP2008188620A (en) * | 2007-02-02 | 2008-08-21 | Bridgestone Corp | Casting method and mold |
-
2008
- 2008-09-11 JP JP2008233981A patent/JP5243157B2/en active Active
-
2009
- 2009-06-15 CN CN2009801356881A patent/CN102149490A/en active Pending
- 2009-06-15 WO PCT/JP2009/060904 patent/WO2010029802A1/en active Application Filing
- 2009-06-15 EP EP09812950.5A patent/EP2335844B1/en not_active Not-in-force
- 2009-06-15 US US13/059,771 patent/US20110174460A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228803A (en) * | 2013-05-20 | 2016-01-06 | 株式会社普利司通 | The manufacture method of tire building mould and tire building mould |
| CN105228803B (en) * | 2013-05-20 | 2017-02-22 | 株式会社普利司通 | Method for manufacturing tire molding die and tire molding die |
| CN105268949A (en) * | 2014-06-05 | 2016-01-27 | 住友橡胶工业株式会社 | Fragment casting method and casting equipment |
| CN110612171A (en) * | 2017-05-09 | 2019-12-24 | 株式会社普利司通 | Method for manufacturing tire molding die |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2335844A4 (en) | 2013-11-27 |
| EP2335844A1 (en) | 2011-06-22 |
| JP2010064115A (en) | 2010-03-25 |
| JP5243157B2 (en) | 2013-07-24 |
| WO2010029802A1 (en) | 2010-03-18 |
| EP2335844B1 (en) | 2019-06-05 |
| US20110174460A1 (en) | 2011-07-21 |
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Application publication date: 20110810 |