CN105799097B - The utricule sulfurizing mould and vulcanization process of a kind of tyre moulding capsules - Google Patents
The utricule sulfurizing mould and vulcanization process of a kind of tyre moulding capsules Download PDFInfo
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- CN105799097B CN105799097B CN201610317677.7A CN201610317677A CN105799097B CN 105799097 B CN105799097 B CN 105799097B CN 201610317677 A CN201610317677 A CN 201610317677A CN 105799097 B CN105799097 B CN 105799097B
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- capsule cylinder
- utricule
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- 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
- B29C33/0022—Multi-cavity moulds
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to the utricule sulfurizing mould and vulcanization process in tire building field, more particularly to a kind of tyre moulding capsules.A kind of sulfurizing mould of tyre moulding capsules utricule, the sulfurizing mould include the first capsule cylinder, the 3rd capsule cylinder, external capsule cylinder, bottom and upper lid；The outer ring of first capsule cylinder is first surface, and the centre of the first capsule cylinder is connected with rotary shaft, and the outer ring of the 3rd capsule cylinder is second surface, bottom is fixedly connected with the 3rd capsule cylinder, the outer ring of bottom is provided with the 3rd surface, and external capsule cylinder is arranged on outer ring, and the inner ring of external capsule cylinder is the 4th surface；First surface, second surface, the 3rd surface and the 4th surface form the mould cavity of utricule, and external capsule cylinder is engaged the left-hand end of closed mould cavity, the right-hand end of upper lid closed mould cavity with bottom；3rd capsule cylinder has been radially arranged filling channel, and filling channel is connected to mould cavity.The utricule vulcanized using the present invention improves the consistency of sizing material, substantially increases the combination strength of sizing material and adhesion-proof cloth.
Description
Technical field
The present invention relates to tire building field, more particularly to a kind of utricule sulfurizing mould of tyre moulding capsules and vulcanization side
Method.
Background technology
Chinese utility model patent（Application number：CN201420214567.4, the applying date：2014.04.30）Disclosed tire
Moulding capsules include utricule and fixed seat, and utricule is arranged in fixed seat, and utricule includes outer utricule, the first anti-package utricule and second
Anti-package utricule, the first anti-package utricule and the second anti-package utricule connects the both ends of outer utricule respectively and anti-package of turning back.This tire into
Type capsule utricule uses straight barrel type structure, spreads film and adhesion-proof cloth successively, fixed using water cloth (also referred to as salt bar), vulcanization
Infantees moisture evaporation produces clamping force afterwards, is combined together adhesion-proof cloth and sizing material, the stability of this technique way depends on
The winding density of water cloth, angle, wind power and the uniformity at winding interval.The difference of winding density and angle, it can cause
The difference of capsule sizing material and adhesion-proof cloth combination force direction；And winding is elastic, and the uniformity can cause capsule to be combined with adhesion-proof cloth
The difference of power size.In the case of complete manual operation, above four elementses can not all be guaranteed.The result of artificial volume production
It is to necessarily lead to capsule quality fluctuation, and clamping force is insufficient as caused by vulcanizing water cloth, causes the knot of sizing material and adhesion-proof cloth
It is inadequate to close strength, has resulted in the early damages such as easy broken skin.In addition, utricule finished product is on frock is installed to, outer utricule and
One anti-package utricule needs once to be turned down, and the characteristic of rubber can produce in the case of bending to arch upward, and big wind necessarily occurs
Stock problem.
The content of the invention
In order to solve above-mentioned technical problem, it is an object of the present invention to provide a kind of sulphur of tyre moulding capsules utricule
Change mould, another object of the present invention is to provide the method vulcanized using above-mentioned mould.Vulcanized using the present invention
Utricule improve the consistency of sizing material, substantially increase the combination strength of sizing material and adhesion-proof cloth.
In order to realize the purpose of above-mentioned first, present invention employs following technical scheme：
A kind of sulfurizing mould of tyre moulding capsules utricule, the sulfurizing mould include the first capsule cylinder, the 3rd capsule cylinder, external capsule
Cylinder, bottom and upper lid；The outer ring of first capsule cylinder is first surface, and the centre of the first capsule cylinder is connected with rotary shaft, the 3rd capsule
The outer ring of cylinder is second surface, and described bottom is fixedly connected with the 3rd capsule cylinder, and the outer ring of bottom is provided with the 3rd surface, external
Capsule cylinder is arranged on outer ring, and the inner ring of external capsule cylinder is the 4th surface；Described first surface, second surface, the 3rd surface and
Four surfaces form the mould cavity of utricule, and described external capsule cylinder is engaged the left-hand end of closed mould cavity, upper lid with bottom
The right-hand end of closed mould cavity；The 3rd described capsule cylinder has been radially arranged filling channel, and filling channel is connected to mould sky
Chamber.
Preferably, the first rim of the mouth bulge loop is set on the left of the first described capsule cylinder with being connected on the right side of the 3rd capsule cylinder, the
The right-hand end of three capsule cylinders is provided with the first formation recess, and the first rim of the mouth mouth mold is formed between the 3rd capsule cylinder and the first rim of the mouth bulge loop.
Preferably, the left-hand end of the 3rd described capsule cylinder is provided with the 3rd formation recess, its right end face of bottom and institute
The vulcanization mouth mold in the second rim of the mouth is formed between the 3rd capsule cylinder stated.
Preferably, the right-hand end of the first described capsule cylinder is provided with connection bulge loop, described upper lid is provided with and first
The bulge loop that the connection bulge loop of capsule cylinder is engaged.
Preferably, the centre of the first described capsule cylinder is connected with adapter sleeve, adapter sleeve is used to connect rotary shaft,
Trip bolt is provided with adapter sleeve.
In order to realize the purpose of above-mentioned second, present invention employs following technical scheme：
A kind of vulcanization process of tyre moulding capsules utricule, this method comprise the following steps that this method uses described mould
Tool, utricule is positioned in mould cavity, and filling channel inflation pressure is 2 ~ 10bar, and cure time is 30 ~ 120min, temperature
For 120 ~ 180 DEG C.
Preferably, inflation pressure is 4 ~ 8bar, cure time is 40 ~ 60min, and temperature is 140 ~ 160 DEG C.
The utricule of the tyre moulding capsules of the present invention, the utricule include the outer utricule of integrated vulcanizing shaping, the first anti-package capsule
Body and the second anti-package utricule, the first anti-package utricule and the second anti-package utricule connects the both ends of outer utricule respectively and anti-package of turning back should
During utricule sulfidization molding, the outer surface fitting mould of outer utricule, the first anti-package utricule and the second anti-package utricule, outer utricule, first
The inner surface of anti-package utricule and the second anti-package utricule inflates 2 ~ 10bar, and cure time is 30 ~ 120min, and temperature is 120 ~ 180
℃。
Preferably, the inner surface of described outer utricule, the first anti-package utricule and the second anti-package utricule inflates 4 ~ 8bar, sulphur
The change time is 40 ~ 60min, and temperature is 140 ~ 160 DEG C.
Preferably, the end of the first described anti-package utricule is provided with the first rim of the mouth, the first rim of the mouth and the first anti-package capsule
Body is vertical setting, and the end of the second anti-package utricule is provided with the second rim of the mouth, and the second rim of the mouth is also perpendicular with the first anti-package utricule
Set.
Preferably, the tip inside protrusion in the first described rim of the mouth is provided with the first ebonite bar, the end in the second rim of the mouth
Inner side protrusion is provided with the second ebonite bar.
Preferably, the outer annular surface of the second described anti-package utricule is oblique ring surface.As further preferably, described external capsule
The end set that body connects with the second anti-package utricule is oblique ring-type.
Preferably, described utricule is made up of outer glue-line, web frame layer and inner glue layer, set in the outer surface of outer utricule
It is equipped with adhesion-proof cloth, adhesion-proof cloth both ends anti-package to the first anti-package utricule and the second anti-package utricule.As further preferably, described outer utricule
There is reinforcement glue-line with area's inner surface setting of turning back of the first anti-package utricule.
The present invention is as a result of above-mentioned technical scheme, the utricule surface vulcanized using the sulfurizing mould of the present invention
Flatness can with pattern have clamshell finish control ensure.The thickness uniformity of utricule, in cavity body of mould size and inflation
In the case of pressure-stabilized, mainly by semi-products film stock thickness influence of fluctuations.In addition, the effect of sizing material and adhesion-proof cloth in interior external pressure
Under combine closely, the early damages such as peeling will not be produced.Simultaneously.Tail shape is consistent with the working condition of design, is not in
The problem of big hip.Further, because the presence of interior external pressure, the joint of surface anti sticking cloth can not have to sewing and use simple
Overlapping mode, it is very smooth.
Brief description of the drawings
Fig. 1 is the structural representation of the utricule of tyre moulding capsules of the present invention.
Fig. 2 is the structural representation of tyre moulding capsules device of the present invention.
Fig. 3 is the structural representation of mould of the present invention.
Fig. 4 is the structural representation of sulfurizing mould of the present invention.
Fig. 5 is the equal thick section wave pattern that K2S tests capsule utricule and the capsule of normal use.
Fig. 6 is normal capsule service life Tracing Experiment figure.
Fig. 7 is K2S capsule series service life Tracing Experiment figures.
Fig. 8 is normal capsule service life Tracing Experiment figure.
Fig. 9 is K2S capsule series service life Tracing Experiment figures.
Embodiment
The utricule of embodiment 1
A kind of utricule of tyre moulding capsules as shown in Figure 1, the utricule include the outer utricule 1 of integrated vulcanizing shaping, the
One anti-package utricule 2 and the second anti-package utricule 3, the first anti-package utricule 2 and the second anti-package utricule 3 connect the both ends of outer utricule 1 respectively
And anti-package of turning back.Described utricule is made up of outer glue-line 11, web frame layer 12 and inner glue layer 13, in the outer surface of outer utricule 1
It is provided with adhesion-proof cloth 14, the both ends anti-package of adhesion-proof cloth 14 to the first anti-package utricule 2 and the second anti-package utricule 3, outer utricule 1 and first anti-
Area's inner surface setting of turning back of cystozooid 2, which has, strengthens glue-line 15.The outer annular surface of second anti-package utricule 3 is oblique ring surface, external capsule
The end set that body 1 connects with the second anti-package utricule 3 is oblique ring-type.The end of the first described anti-package utricule 2 is provided with first
Rim of the mouth 4, the first rim of the mouth 4 are vertical setting with the first anti-package utricule 2, and the end of the second anti-package utricule 3 is provided with the second rim of the mouth 5,
Second rim of the mouth 5 is also vertical setting with the first anti-package utricule 2.The tip inside protrusion in the first rim of the mouth 4 is provided with the first ebonite bar
6, the tip inside protrusion in the second rim of the mouth 5 is provided with the second ebonite bar 7.
The mould of embodiment 2
Mould as shown in Figure 3 includes the first capsule cylinder 31, the second capsule cylinder 32, pressure ring 33 and bonnet 34.First capsule cylinder
31 and second are connected with adapter sleeve 35 among capsule cylinder 32, and adapter sleeve 35 is used to connect rotary shaft, set on adapter sleeve 35
There is trip bolt 36.The left end of first capsule cylinder 31 is provided with the first rim of the mouth bulge loop 37, and right-hand member is provided with connection bulge loop 38, the first capsule
It is connected with each other between the capsule cylinder 32 of cylinder 31 and second by connecting bulge loop 38, the right-hand member of the second capsule cylinder 32 is provided with the second rim of the mouth bulge loop
39, described pressure ring 33 is fixedly installed in the annular groove of the second rim of the mouth bulge loop 39 formation, the outer ring of pressure ring 33 and the second rim of the mouth
The inner ring of bulge loop 39 is isometrical, and described bonnet 34 is fixedly connected with pressure ring 33, and bonnet 34 is in direction the second rim of the mouth bulge loop 39 lower end
Side be provided with the second formation recess 40.The second son is formed between described the second rim of the mouth bulge loop 39, pressure ring 33 and bonnet 34
Mouth mouth mold 41.
The sulfurizing mould of embodiment 3
Sulfurizing mould as shown in Figure 4 includes the first capsule cylinder 31, the 3rd capsule cylinder 42, external capsule cylinder 43, bottom 44 and upper lid
45.The first described capsule cylinder 31 is identical with the first capsule cylinder 31 of embodiment 1, and the outer ring of the first capsule cylinder 31 is first surface 46, the
The centre of one capsule cylinder 31 is connected with adapter sleeve 35, and adapter sleeve 35 is used to connect rotary shaft, is provided with adapter sleeve 35 tight
Gu screw 36.The first rim of the mouth bulge loop 37 in the left side of the first capsule cylinder 31 is connected with the right side of the 3rd capsule cylinder 42, the 3rd capsule cylinder 42
Outer ring is second surface 47, and the right-hand end of the 3rd capsule cylinder 42 is provided with the first formation recess 48, the 3rd capsule cylinder 42 and the first rim of the mouth
The first rim of the mouth mouth mold 49 is formed between bulge loop 37.The left-hand end of 3rd capsule cylinder 42 is provided with the 3rd formation recess 54, described bottom
Lid 44 is fixedly connected with the 3rd capsule cylinder 42, and the outer ring of bottom 44 is provided with the 3rd surface 50, its right end face of bottom 44 with it is described
The 3rd capsule cylinder 42 between form the vulcanization mouth mold 51 in the second rim of the mouth 5.External capsule cylinder 43 is arranged on outer ring, external capsule cylinder 43 it is interior
Enclose as the 4th surface 52.Described first surface 46, second surface 47, the 3rd surface 50 and the 4th surface 52 forms the mould of utricule
Has cavity, described external capsule cylinder 43 is engaged the left-hand end of closed mould cavity with bottom 44, and described upper lid 45 is provided with
The bulge loop being engaged with the connection bulge loop 38 of the first capsule cylinder 31, the right-hand end of the upper closed mould cavity of lid 45.The 3rd described capsule
Cylinder 42 has been radially arranged filling channel 53, and filling channel 53 is connected to mould cavity.
The utricule molding sulfuration process of embodiment 4
1. mould is carried out assembled；
2. spreading framework material and double-layer film successively on the first capsule cylinder 31, the second capsule cylinder 32, and reserve rim of the mouth
Width；
3. putting hard glue core in rim of the mouth position, rubber cement is brushed, respectively in the first rim of the mouth mouth mold 49 and the second rim of the mouth mouth mold
41 extrude the shape in the first rim of the mouth 4 and the second rim of the mouth 5；
4. removing bonnet 34, lid 45 is covered, the material posted is carried out into turnover forms the first anti-package utricule 2 and outer utricule
1, the first anti-package utricule 2 is attached to first surface 46, and outer utricule 1 is turned back in the upper position of lid 45, and the outer left side of utricule 1 rides over second surface
On, then turn back to form the second anti-package utricule 3 again, the second rim of the mouth 5 of the end of the second anti-package utricule 3 is buckled in the 3rd capsule cylinder 42
End；Finally adhesion-proof cloth 14 is sticked on utricule surface；
It is past by filling channel 5. cover bottom 44 and external capsule cylinder 43 is fixed, utricule 1, the and of the first anti-package utricule 2 outward
The inner surface inflation of second anti-package utricule 3, air pressure 6bar；
6. sulfurizing mould is put into vulcanizing tank to be vulcanized, cure time 50min, temperature is 150 DEG C
7. the mould vulcanized is dismantled, capsule is taken out, placement week age, which carries out production, under reasonable environment makes
With.
The capsule apparatus of embodiment 5
A kind of tyre moulding capsules device as shown in Figure 2, the device include utricule and fixed seat, and fixed seat includes cylinder
21st, support plate 22 and external pressure plate 23, cylinder 21 and external pressure plate 23 are respectively fixedly disposed at the both sides of support plate 22, and the first rim of the mouth 4 is fixed
It is arranged between cylinder 21 and support plate 22, the second rim of the mouth 5 is fixedly installed between support plate 22 and external pressure plate 23, is set on support plate 22
There is the stomata 24 of radial direction, stomata 24 is connected to utricule inner chamber.Two end faces of support plate 22 are provided with the first fixing port 27 and second
Fixing port 28, is provided with the first fixing groove 25 between the end face of cylinder 21 and the end face of support plate 22, the first rim of the mouth 4 is fixedly installed on first
In fixing groove 25, the first ebonite bar 6 is embedded in the first fixing port 27, has second between support plate 22 and the end face of end face external pressure plate 23
Fixing groove 26, the second rim of the mouth 5 are fixedly installed in the second fixing groove 26, and the second ebonite bar 7 is embedded in the second fixing port 28.
Test example
Take each 1 of 14 cun of capsules of experiment capsule K2S prepared by 14 cun of embodiment of the present invention 4 and normal production and application, edge
Capsule circumferencial direction uniformly cuts 3 sections of samples, labeled as 1#, 2#, 3#.Sample, every 20mm, takes successively since capsule head end
Ten measurement points, labeled as 1-10, use the thickness of each mark point of vernier caliper measurement.
Following table is the recording photograph and measurement data of print：
The experiment capsule K2S thick section thickness of capsule designs is 3.8-4.0mm, and afterbody has one piece of reinforcement film, thickness
For 0.7-0.8mm.Because having contraction after the capsule heat demoulding, the equal thick section thickness of actual print is in 3.0mm, the corresponding thickness one of afterbody
Point.
The thick section thickness of design of normal production capsule is 5.5mm, head and afterbody because capsule bucket is designed with step, film
Extension has bubble presence, and causes local thickness to become big or diminish.Actual thick section thickness should be 4.5mm, head or
Afterbody local location meeting thickness is exceeded or insufficient.
Coordinate map analysis such as Fig. 5 is carried out for data above:K2S tests capsule in thick section fluctuation very little（Maximum fluctuation
Value 0.16mm, 5.0%）;The capsule of normal use is larger in thick section fluctuation（Maximum fluctuation value 0.75mm, 16.7%）.
The thickness fluctuation of rubber capsule is big, and when with isobaric inflated condition, height occurs in the position of different-thickness.Instead
Because capsule surface out-of-flatness during bag, make the power of anti-package uneven, the problems such as influenceing uniformity.And K2S capsules are one more equal
One product, the active section especially in turn-up process, this section of thickness fluctuation is smaller, and the difference of power is with regard to smaller during anti-package, fetus
Quality is higher.
K2S capsule series are not in early damage problem it can be seen from above result of the test as shown in Fig. 6 ~ 9, no
The situation that Forming Quality may be influenceed by having peeling, scaling-off, suture destruction etc. occurs.And K2S capsule series are using the longevity
The convenient performance of life is highly beneficial, and from the point of view of the operations for forming situation of moderate strength, service life improves 550% ~ 650%, even in
Under the conditions of the operations for forming of one load high intensity of producing at full capacity, shaping more than 20000 times still can guarantee that.
Estimated with the experiment effect of reality, experiment service life reaches flat 350% ~ 600% of raw water.Save because of glue
It down time caused by capsule the reason of changing, can convert as improving production efficiency, former every 70 composing type machine plan is reduced 1 group.Such as
Full factory's forming machine can be generalized to, 130 estimations, can save equipment cost 5,300,000, labor hour, capsule cost every year in an amount
About more than 180 ten thousand, add up to 7,000,000/year of escapable cost altogether.
Claims (7)
1. a kind of sulfurizing mould of tyre moulding capsules utricule, it is characterised in that the sulfurizing mould includes the first capsule cylinder（31）, the
Three capsule cylinders（42）, external capsule cylinder（43）, bottom（44）With upper lid（45）；First capsule cylinder（31）Outer ring be first surface（46）,
First capsule cylinder（31）Centre be connected with rotary shaft, the 3rd capsule cylinder（42）Outer ring be second surface（47）, described bottom
Lid（44）With the 3rd capsule cylinder（42）It is fixedly connected, bottom（44）Outer ring be provided with the 3rd surface（50）, external capsule cylinder（43）If
Put in outer ring, external capsule cylinder（43）Inner ring be the 4th surface（52）；Described first surface（46）, second surface（47）,
Three surfaces（50）With the 4th surface（52）Form the mould cavity of utricule, described external capsule cylinder（43）With bottom（44）It is engaged
The left-hand end of closed mould cavity, upper lid（45）The right-hand end of closed mould cavity；The 3rd described capsule cylinder（42）Radial direction set
It is equipped with filling channel（53）, filling channel（53）It is connected to mould cavity.
A kind of 2. sulfurizing mould of tyre moulding capsules utricule according to claim 1, it is characterised in that：First capsule cylinder
（31）Left side sets the first rim of the mouth bulge loop（37）With the 3rd capsule cylinder（42）Right side be connected, the 3rd capsule cylinder（42）Right-hand end set
It is equipped with the first formation recess（48）, the 3rd capsule cylinder（42）With the first rim of the mouth bulge loop（37）Between form the first rim of the mouth mouth mold（49）.
A kind of 3. sulfurizing mould of tyre moulding capsules utricule according to claim 1, it is characterised in that：3rd capsule cylinder
（42）Left-hand end be provided with the 3rd formation recess（54）, bottom（44）Its right end face and described the 3rd capsule cylinder（42）Between
Form the vulcanization mouth mold in the second rim of the mouth（51）.
A kind of 4. sulfurizing mould of tyre moulding capsules utricule according to claim 1, it is characterised in that：First capsule cylinder
（31）Right-hand end be provided with connection bulge loop（38）, described upper lid（45）It is provided with and the first capsule cylinder（31）Connection bulge loop
（38）The bulge loop being engaged.
A kind of 5. sulfurizing mould of tyre moulding capsules utricule according to claim 1, it is characterised in that：First capsule cylinder
（31）Centre be connected with adapter sleeve（35）, adapter sleeve（35）For connecting rotary shaft, in adapter sleeve（35）On be provided with
Trip bolt（36）.
6. a kind of vulcanization process of tyre moulding capsules utricule, it is characterised in that this method comprises the following steps that this method uses
Mould described in claim 1 ~ 5 any one claim, utricule is positioned in mould cavity, filling channel（53）Inflation
Pressure is 2 ~ 10bar, and cure time is 30 ~ 120min, and temperature is 120 ~ 180 DEG C.
A kind of 7. vulcanization process of tyre moulding capsules utricule according to claim 6, it is characterised in that：Inflating pressure is
4 ~ 8bar, cure time are 40 ~ 60min, and temperature is 140 ~ 160 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610317677.7A CN105799097B (en) | 2016-05-13 | 2016-05-13 | The utricule sulfurizing mould and vulcanization process of a kind of tyre moulding capsules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610317677.7A CN105799097B (en) | 2016-05-13 | 2016-05-13 | The utricule sulfurizing mould and vulcanization process of a kind of tyre moulding capsules |
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| CN105799097B true CN105799097B (en) | 2017-11-28 |
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| CN205735691U (en) * | 2016-05-13 | 2016-11-30 | 中策橡胶集团有限公司 | A kind of utricule sulfurizing mould of tyre moulding capsules |
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2016
- 2016-05-13 CN CN201610317677.7A patent/CN105799097B/en active Active
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