CN210553955U - One-step forming inflation-free hollow tire and mold set for manufacturing same - Google Patents
One-step forming inflation-free hollow tire and mold set for manufacturing same Download PDFInfo
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- CN210553955U CN210553955U CN201921651780.0U CN201921651780U CN210553955U CN 210553955 U CN210553955 U CN 210553955U CN 201921651780 U CN201921651780 U CN 201921651780U CN 210553955 U CN210553955 U CN 210553955U
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Abstract
The utility model discloses a one shot forming exempts from to aerify cavity tire and make mould group of this tire belongs to the tire processing field. The tire comprises a tire body and a cavity structure, wherein the cavity structure is arranged in the tire body along the circumferential direction, and a hollow cavity is formed in the tire body; the opening structure is a groove which is formed in the inner ring surface of the tire body along the circumferential direction, and the opening structure enables the cavity structure to be communicated with the outside; the manufacture of the carcass with a hollow structure can be completed by one-time mold closing operation through the matching of the upper mold, the middle mold and the lower mold, plasticization, mold closing, injection, vulcanization and mold opening. The utility model discloses a mould group that the improvement cooperation of matrix structure corresponds makes hollow structure can one-time forming, and open structure has still alleviateed matrix weight, further reduces material cost and tire and rolls and hinder, has simplified the preparation process under the prerequisite that does not reduce cavity tire performance, and the big batch preparation of being convenient for and the yield height.
Description
Technical Field
The utility model belongs to the tire processing field, more specifically say, relate to a one shot forming exempts from to aerify cavity tire and make mould group of this tire.
Background
The tire is divided into a pneumatic tire and a non-pneumatic tire, and is widely used in view of the fact that the conventional pneumatic tire is mature in production process, good in riding comfort and good in bearing capacity due to cushioning. However, as a large number of vehicle driving safety accidents are more and more caused by tire burst, abrasion and unstable running, the inflation-free tire has no inner tube, and the inflation-free tire has the advantages of high safety, energy conservation, environmental protection and the like, so that people pay more attention to the tire. The non-pneumatic tire is divided into a solid tire and a hollow tire, and the hollow tire greatly overcomes the defect of jolt caused by insufficient resilience in the riding process of the non-pneumatic tire.
The existing hollow tire is manufactured by adopting a traditional mould pressing vulcanization molding process, the process is difficult to realize full-automatic production due to complex working procedures, and is greatly influenced by human factors, so that the production efficiency is low and the yield is low when the tubeless tire is manufactured.
Chinese patent publication No.: CN 109109352A; the publication date is as follows: 1 month and 1 day 2019; disclosed is a one-time injection, hollow and vulcanization molding production method of rubber products, which can complete the injection, hollow and vulcanization processes in the same mold cavity, wherein the mold cavity comprises an upper half mold, a lower half mold and a mold core, the mold core lays a foundation for the hollow of the mold cavity, the hollow mold has the condition of filling high-temperature and high-pressure gas required by vulcanization, and further integrates the injection molding, hollow and vulcanization devices, thereby avoiding the heat loss and process flow cost caused by the flow of each process in the prior art, greatly improving the defect of complex process in the traditional process, simplifying the manufacturing process, but through the use of the process, the process can theoretically realize full-automatic production, but when the hollow tire is vulcanized and molded in the actual production process, high-temperature gas or compressed air and the like need to be introduced to heat the inner cavity of the hollow tire, the yield of the hollow tire is found to be low, meanwhile, high-temperature gas or compressed air and the like are needed to be generated in the operation process of equipment, so that potential safety hazards exist, the responsible coefficient of the product implementation process is increased, and large-scale industrial production is difficult to realize.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
The problem complicated, the yield is low to cavity inflation-free tire preparation among the prior art, the utility model provides a one shot forming inflation-free hollow tire and make the mould group of this tire, through the mould group and the manufacturing method that the improvement cooperation of matrix structure corresponds, make the matrix that has hollow structure can one shot forming, be convenient for make in batches and the yield is high.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides an one shot forming exempts from to aerify hollow tire, includes the matrix, still includes:
the cavity structure is arranged in the tire body along the circumferential direction, and a cavity chamber is formed in the tire body; and
and the opening structure is a groove which is arranged on the inner ring surface of the tire body along the circumferential direction, and the opening structure is used for communicating the cavity structure with the outside.
According to the one-step forming inflation-free hollow tire, the cavity structure is arranged in the tire body and forms the hollow of the tire, when the tire is used, the cavity structure buffers and damps impact force transmitted from the tire tread, the anti-vertex effect is achieved, the weight of the tire body is reduced, and rolling resistance is reduced; the opening structure is an opening formed on the inner circle surface of the tire body, the cavity structure is communicated with the outside, the opening structure is used for directly drawing out a mold core for forming the hollow structure from the opening structure after the hollow structure is formed, operations such as secondary mold opening, secondary mold closing, gas injection, pressure relief and the like are not needed, errors and accident rate are reduced, and the yield is improved.
Further, the opening width r of the opening structure gradually increases from the cavity structure to the inner ring direction of the tire body.
According to the tire, the shape of the opening structure is shown to be triangular from the cavity structure to the inner ring direction of the tire body from the tire body section, so that after the tire is formed, the mold core is easy to take out, the cavity structure and the opening structure in the tire body cannot be damaged, and the yield of the hollow tire is high.
Further, the opening width r of the opening structure is gradually reduced from the cavity structure to the inner ring direction of the tire body.
The tire of this scheme, the shape of open structure shows from the matrix section to be the triangle-shaped of falling from cavity structure to matrix inner circle direction, the open structure of this scheme, the rim is installed the back, compress tightly from matrix inboard both sides, cooperate with open structure and form the locking effect, fastening effect between rim and matrix has been strengthened on the one hand, on the other hand, the rim compresses tightly the back open structure closure inseparabler, meet the atmospheric pressure release in the cavity structure when jolting more slowly in traveling, the deformation of tread has been reduced, and then road feel has been strengthened, the consumption of drive power has been saved.
Further, the opening width r of the opening structure is not more than 1/6 of the inner width L of the tire body.
The bigger the opening width r of the opening structure is, the easier the taking-out operation of the mold core is, but the too big opening structure easily leads to the inner side wall of the tire body to be too thin and further leads to the wheel rim to be installed, the inner side structure of the tire body is easily damaged and collapsed, and the tire can not be normally used, and through experiments, the opening width r of the opening structure is controlled not to exceed 1/6 of the inner side width L of the tire body, so that the inner side structure of the tire body can not be damaged under the normal conditions of the pressing force of the wheel rim and the working condition.
A mold set for making a one-shot, non-pneumatic hollow tire, comprising:
a lower die, wherein a die cavity is arranged on the die joint surface of the lower die, and the shape of the die cavity is matched with that of a half of the tire body;
the middle mold consists of an inner cavity mold and an opening mold, the inner cavity mold is an annular structural body with the shape matched with the shape of the cavity structure, the opening mold is an annular sheet with the shape matched with the shape of the opening structure, and the opening mold is fixedly connected to the inner side of the inner cavity mold; the middle die is arranged between the lower die and the upper die;
the upper die is matched with the lower die in structure and symmetrically arranged above the lower die;
and the injection hole is a through hole which is formed in the side wall of the lower die or the upper die and communicated with the cavity.
The injection hole of this scheme is seted up at last mould lateral wall, and is linked together with the die cavity on last mould compound die surface, goes up mould and bed die compound die back, and the die cavity constitutes the die cavity of complete matrix shape, and well mould is arranged in between the bed die as the mold core, and the inner chamber mould of well mould is arranged in the die cavity that the compound die formed completely in, and open mould part is arranged in the die cavity, and the part is kept somewhere outside the die cavity, takes out well mould after making things convenient for the matrix shaping.
Furthermore, an installation groove is annularly formed in the joint surface on the inner side of the lower die cavity, and the shape of the installation groove is matched with that of an open die of the middle die; the same mounting grooves are formed in the corresponding positions of the die closing surfaces of the upper die.
On the matched die face of bed die, the mounting groove has been seted up to the department of placing of opening mould of well mould, and the placing of well mould before convenient compound die at every turn, well mould hollow part blocks just on the other bellied compound die face part of mounting groove for well mould at every turn can pinpoint and place, further improves the qualification rate of making matrix product, guarantees product quality.
A method for manufacturing a one-time forming inflation-free hollow tire comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: installing a middle die on a lower die through an installation groove, and closing the upper die and the lower die;
thirdly, injection: the plasticized fluid-like rubber material is filled into the whole cavity through the injection hole and then is kept stand for molding;
fourthly, vulcanization: vulcanizing the rubber product in the cavity;
fifthly, opening the die: and opening the mold after vulcanization, taking out the molded tire body, and taking out the middle mold from the opening structure.
The manufacturing method of the one-time forming inflation-free hollow tire comprises the steps of plasticizing, mold closing and injecting, so that a complete and integrally formed tire body structure is obtained in a mold cavity in a mold set, a cavity structure and an opening structure of the tire body are also formed, the mold cavity in the mold set keeps certain pressure and heats the mold set to reach the vulcanization temperature of the tire body, vulcanization of the tire body is completed after certain time, the tire body in the mold cavity of the mold set is of a high-strength and high-elasticity rubber structure, the mold is opened, the tire body is taken out of the mold set, the inner ring surface of the tire body is stretched, and a middle mold is taken out, so that the hollow inflation-free tire body structure is obtained.
Further, vacuumizing is carried out after the die is closed in the second step, and the cavity is in a negative pressure state; in the die closing process, the die cavity is heated to 150-200 ℃.
The rubber material can be injected and filled in the die cavity more easily when the die cavity of the die set is vacuumized to facilitate the injection step, the temperature of each part of the die cavity is ensured to reach 150-200 ℃ by heating the outside of the die set or heating devices arranged in the upper die and the lower die respectively and heating the inside and the outside together, the rubber material injected into the die cavity is ensured to have enough fluidity, and the rubber material cannot be pre-cooled and bonded near an injection hole to influence the injection of the rubber material.
And further, in the injection in the third step, the material temperature is 60-100 ℃, the injection time is 5-30 s, and the injection is followed by standing for 10-30 s.
The injection temperature is guaranteed to be 60-100 ℃, the flowability of the rubber material during injection is guaranteed, further, the injection time is controlled within 5-30 s, the phenomenon that the subsequent injection is influenced by the fact that the rubber material is injected too slowly and molded in advance in a mold cavity is prevented, the tire is kept stand for 10-30 s after injection, and the tire is molded initially during the period.
Further, the vulcanization time of the step four is 50-800 s. The vulcanization time is controlled to be 50-800 s according to the size of the formed tire body. 3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the one-step forming inflation-free hollow tire of the utility model can form the hollow structure at one time through the improvement of the tire body structure, and the opening structure also lightens the weight of the tire body, further reduces the material cost and the rolling resistance of the tire, realizes the one-step forming of the hollow structure of the inflation-free tire under the premise of not reducing the use performance of the hollow tire, is convenient for mass production and has high yield;
(2) the one-step forming inflation-free hollow tire of the utility model has the advantages that the opening width r of the opening structure is gradually increased from the cavity structure to the inner ring direction of the tire body, so that the mold core is easy to take out after the tire is formed, the cavity structure and the opening structure in the tire body can not be damaged, and the yield of the hollow tire is high;
(3) the utility model discloses a one shot forming inflation-free hollow tire, open structure's opening width r reduces from cavity structure to matrix inner circle direction gradually, and the rim is installed the back, compresses tightly from matrix inboard both sides, forms locking effect with open structure cooperation, has strengthened the fastening effect between rim and matrix on the one hand, and on the other hand, the rim compresses tightly the back open structure closure more closely, and the atmospheric pressure release in the cavity structure is more slow when running and meetting jolting, has reduced the deformation of tread, and then has strengthened the road feel, has saved the consumption of drive power;
(4) the one-step forming inflation-free hollow tire of the utility model can ensure that the inner side structure of the tire body can not be damaged under the normal rim pressing force and the working condition that the tire is suitable when the opening width r of the opening structure is controlled not to exceed 1/6 of the inner side width L of the tire body;
(5) the mould set for manufacturing the once-forming inflation-free hollow tyre can complete the manufacture of the tyre body with the hollow structure through one-time mould closing operation by matching the upper mould, the middle mould and the lower mould, greatly simplifies the manufacturing process of the hollow tyre, and has convenient operation and high production efficiency;
(6) the utility model discloses a make one shot forming exempt from to aerify cavity tire's mould group, on the matched mould face of bed die, the opening mould of well mould is placed the department and is seted up the mounting groove, makes things convenient for the placing of well mould before the compound die at every turn, well mould cavity part card is on the protruding matched mould face part of mounting groove side just, makes the well mould of every turn can pinpoint and place, further improves the qualification rate of making matrix product, guarantees product quality;
(7) the utility model discloses a manufacturing method of one shot forming inflation-free hollow tire, injection vulcanization after the compound die once, can directly obtain the matrix of the integrative hollow structure of shaping, simple process has reduced manufacturing cost, and the preparation is consuming time weak point, and production efficiency is high, and because the matrix of preparation is integrated into one piece, its homogeneity, balance performance are high, use experience is good, the security performance is high;
(8) the utility model discloses a manufacturing method of one shot forming inflation-free hollow tire, the die cavity of mould group is pumped into the vacuum state and rubber material can more easily inject and fill up the die cavity when the step of injection is convenient, through heating the temperature everywhere in the die cavity to 150-200 ℃, it is enough to ensure that the rubber material fluidity of injecting into the die cavity is enough, can not precool and bond near the injection orifice and influence the injection of rubber material;
(9) the utility model discloses a manufacturing method of cavity tire is exempted from to aerify in one shot forming, control injection temperature are between 60 ~ 100 ℃, ensure the mobility of rubber material during the injection, and injection time control prevents to inject too slow rubber material and in the die cavity shaping in advance influence follow-up injection.
Drawings
FIG. 1 is a schematic structural view of a one-step forming inflation-free hollow tire of the present invention;
FIG. 2 is a cross-sectional view of the one-step forming inflation-free hollow tire of the present invention;
FIG. 3 is an enlarged view of A in FIG. 2 of example 3;
FIG. 4 is an enlarged view of A in FIG. 2 of example 2;
FIG. 5 is a schematic structural view of a mold set for manufacturing a one-step forming inflation-free hollow tire according to the present invention;
FIG. 6 is a schematic structural view of a mold set for manufacturing a one-step forming inflation-free hollow tire according to the present invention;
FIG. 7 is a schematic view of a middle mold structure of a mold set for manufacturing a one-step forming inflation-free hollow tire according to the present invention;
FIG. 8 is a schematic view of a partially cut-away structure of a middle mold of a mold set for manufacturing a one-step forming inflation-free hollow tire according to the present invention;
FIG. 9 is a schematic view of the lower mold structure of the mold set for manufacturing an inflation-free hollow tire
Fig. 10 is an enlarged view of a in fig. 2.
In the figure:
1. a carcass; 10. a cavity structure; 11. an open structure;
2. a die set; 20. a lower die; 200. a cavity; 201. mounting grooves; 21. a middle mold; 210. an inner cavity mold; 211. opening the mold; 22. and (4) an upper die.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
As shown in fig. 1 and fig. 2, an one-step forming inflation-free hollow tire includes a tire body 1, and further includes:
a cavity structure 10, which is opened inside the tire casing 1 along the circumferential direction, and forms a hollow cavity inside the tire casing 1; and
and the opening structure 11 is a groove which is formed in the inner ring surface of the tire body 1 along the circumferential direction, and the opening structure 11 is used for communicating the cavity structure 10 with the outside.
The hollow inner cavity of the hollow tire is formed mostly by means of placing a mold core in a cavity of a formed tire during tire manufacturing, and taking mold core stripping into consideration after the inner cavity of the tire is formed, so that the existing hollow tire cannot be directly formed at one time, and the production and manufacture of the hollow inflation-free tire are troublesome.
In the once-forming inflation-free hollow tire of the embodiment, the cavity structure 10 is arranged in the tire body 1, the cavity structure 10 forms the hollow of the tire, when the tire is used, the cavity structure 10 buffers and dampens impact force transmitted from a tire tread, the effect of preventing a peak is achieved, the weight of the tire body 1 is reduced, and rolling resistance is reduced; the open structure 11 is an opening formed on the inner circumferential surface of the carcass 1, communicating the cavity structure 10 with the outside, and through the open structure 11, when the tire is molded, after the hollow structure is molded, the mold core for molding the hollow structure is directly pulled out from the opening structure 11, operations such as secondary mold opening, secondary mold closing, gas injection, pressure relief and the like are not needed, the error and accident rate is reduced, the yield is improved, the tire with the structure of the embodiment is obtained by directly pulling out the mold core after the mold core is put into a mold assembly for manufacturing the tire and is closed, the tire is molded, and the hollow structure can be molded at one time, and the open structure 11 also reduces the weight of the tire body 1, further reduces the material cost and the rolling resistance of the tire, the hollow structure of the inflation-free tire can be formed at one time on the premise of not reducing the performance of the hollow tire, the manufacturing is convenient, and the yield is high.
The tire body 1 of this embodiment, the rim installation back, the rim compresses tightly the tire inboard from 1 inboard both sides face of tire body, and then compresses tightly opening structure 11, and opening structure 11 can not contact with external road surface, and the tire body 1 of this embodiment is through once moulding plastics direct forming, and tire body 1 homogeneity is high, and the equilibrium is good, does not have laminating, junction on the tire body 1, in the use, especially stability, the security when high-speed use are high.
Example 2
As shown in fig. 4 and fig. 10, the one-step forming non-pneumatic hollow tire of the present embodiment is further improved on the basis of embodiment 1, and the opening width r of the opening structure 11 gradually increases from the cavity structure 10 to the inner ring direction of the tire body 1.
In the tire of the present embodiment, the shape of the opening structure 11 appears to be triangular from the cavity structure 10 to the inner circle direction of the tire body 1 from the cross section of the tire body 1, and the opening structure 11 of the present embodiment makes the core removal operation easy after the tire is formed, and does not damage the cavity structure 10 and the opening structure 11 in the tire body 1, and the yield of the hollow tire is high.
Example 3
As shown in fig. 3 and fig. 10, the one-step forming non-pneumatic hollow tire of the present embodiment is further improved on the basis of embodiment 1, and the opening width r of the opening structure 11 is gradually reduced from the cavity structure 10 to the inner ring direction of the tire body 1.
The tire of this embodiment, the shape of open structure 11 shows from matrix 1 section to be the reverse triangle from cavity structure 10 to matrix 1 inner circle direction, open structure 11 of this embodiment, the rim is installed the back, compress tightly from matrix 1 inboard both sides, cooperate with open structure 11 and form locking effect, the fastening effect between rim and matrix 1 has been strengthened on the one hand, on the other hand, open structure 11 is closed inseparabler after the rim compresses tightly, meet the atmospheric pressure release in the bumping space cavity structure 11 more slowly when going, the deformation of tread has been reduced, and then road feel has been strengthened, the consumption of drive power has been saved.
Example 4
As shown in fig. 10, the one-step forming non-pneumatic hollow tire of the present embodiment is further improved based on embodiments 1 to 3, and the opening width r of the opening structure 11 is not more than 1/6 of the inner width L of the tire body 1.
The larger the opening width r of the opening structure 11 is, the easier the taking-out operation of the mold core is, but the too large opening structure 11 easily causes the inner side wall of the tire body 1 to be too thin, so that after the rim is installed, the inner side structure of the tire body 1 is easily damaged and collapsed, and the tire cannot be normally used, and through tests, when the opening width r of the opening structure 11 is controlled not to exceed 1/6 of the inner side width L of the tire body 1, the inner side structure of the tire body 1 cannot be damaged under normal rim pressing force and tire application working conditions.
Example 5
As shown in fig. 5, 6, 7 and 8, a mold set for manufacturing a one-time forming inflation-free hollow tire includes:
a lower mold 20, wherein a mold cavity 200 is arranged on a mold clamping surface of the lower mold, and the shape of the mold cavity 200 is matched with that of a half of the tire body 1;
the middle mold 21 is composed of an inner cavity mold 210 and an opening mold 211, the inner cavity mold 210 is an annular structural body with a shape matched with that of the cavity structure 10, the opening mold 211 is an annular sheet with a shape matched with that of the opening structure 11, and the opening mold 211 is fixedly connected to the inner side of the inner cavity mold 210; the middle die 21 is arranged between the lower die 20 and the upper die 22;
the upper die 22 is matched with the lower die 20 in structure and is symmetrically arranged above the lower die 20;
and an injection hole which is a through hole formed in a sidewall of the lower mold 20 or the upper mold 22 and communicated with the cavity 200.
The injection hole of this embodiment is opened on the sidewall of the upper mold 22, and is communicated with the cavity 200 on the matched mold surface of the upper mold 22, after the upper mold 22 and the lower mold 20 are matched, the cavity 200 forms a complete mold cavity in the shape of the tire body 1, the middle mold 21 is used as a mold core and is placed between the upper mold and the lower mold, the inner cavity mold 210 of the middle mold 21 is completely placed in the mold cavity formed after matching, the open mold 211 is partially placed in the mold cavity, and a part is left outside the mold cavity, so that the middle mold 21 can be conveniently taken out after the tire.
In the mold set 2 of the embodiment, when in use, the middle mold 21 is placed on the joint surface of the lower mold 20, the inner cavity mold 210 is positioned above the cavity 200, the opening mold 211 is partially positioned above the cavity 200, and is partially positioned on the joint surface, the upper mold 22 is closed after the middle mold 21 is placed, then the rubber material is injected through the injection hole, after the injection, the tire body 1 in the cavity is molded, the vulcanization and mold opening are performed, the tire body 1 is taken down, and the middle mold 21 is taken out, so that the hollow tire body 1 can be obtained.
The mold set 2 of the embodiment can complete the manufacture of the tire body 1 with the hollow structure through one-time mold closing operation by matching the upper mold, the middle mold and the lower mold, greatly simplifies the manufacture process of the hollow tire, and has convenient operation and high production efficiency.
Example 6
As shown in fig. 9, the mold set for manufacturing a one-step forming non-pneumatic hollow tire according to the present embodiment is further improved from embodiment 5, in which an installation groove 201 is annularly formed on a mold clamping surface inside a cavity 200 of the lower mold 20, and a shape of the installation groove 201 matches a shape of an opening mold 211 of the middle mold 21; the same mounting grooves 201 are formed at the corresponding positions of the clamping surfaces of the upper die 22.
The die set of this embodiment, on the compound die surface of bed die 20, the mounting groove 201 has been seted up to the department of placing of well mould 21's opening mould 211, and the placing of well mould 21 before convenient compound die at every turn, well mould 21 hollow portion blocks on the other bellied compound die surface portion of mounting groove 201 just for well mould 21 at every turn can pinpoint and place, further improves the qualification rate of making matrix 1 product, guarantees product quality.
Example 7
A method for manufacturing a one-time forming inflation-free hollow tire comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: mounting a middle die 21 on a lower die 20 through a mounting groove 201, and closing an upper die 22 and the lower die 20;
thirdly, injection: the plasticized fluid-like rubber material is filled into the whole cavity 200 through the injection hole and then is subjected to standing forming;
fourthly, vulcanization: vulcanizing the rubber product in the cavity 200;
fifthly, opening the die: after vulcanization, the mold is opened, the molded carcass 1 is removed, and the middle mold 21 is removed from the open structure 11.
The method for manufacturing the one-time molding inflation-free hollow tire of the embodiment includes steps of plasticizing, mold closing and injecting, so that a complete and integrally molded tire body 1 structure is obtained in a mold cavity in a mold set 2, a cavity structure 10 and an opening structure 11 of the tire body 1 are also molded, at the moment, the mold cavity in the mold set 2 keeps a certain pressure and heats the mold set 2 to reach the vulcanization temperature of the tire body 1, the vulcanization of the tire body 1 is completed after a certain time, at the moment, the tire body 1 in the mold cavity of the mold set 2 is of a high-strength and high-elasticity rubber structure, the mold is opened, the tire body 1 is taken out of the mold set 2, the inner ring surface of the tire body 1 is opened, and a middle mold 21 is taken out, so that the hollow.
The method for manufacturing the one-time molding inflation-free hollow tire has the advantages that the tire body 1 of the molded integrated hollow structure can be directly obtained by injection vulcanization after one-time mold closing, the process is simple, the production cost is reduced, the manufacturing time is short, the production efficiency is high, and the manufactured tire body 1 is integrally molded, so that the uniformity and the balance performance are high, the use experience is good, and the safety performance is high.
Example 8
The method for manufacturing the one-time molding inflation-free hollow tire is further improved on the basis of the embodiment 7, in the second step, after the mold is closed, the mold cavity 200 is vacuumized, and the interior of the mold cavity is in a negative pressure state; in the die assembly process, the die cavity 200 is heated to 150-200 ℃.
The rubber material can be injected and filled in the die cavity more easily when the die cavity of the die set 2 is vacuumized to facilitate the injection step, the temperature of each part of the die cavity 200 is ensured to reach 150-200 ℃ by heating the outside of the die set 2 or heating devices arranged in the upper die and the lower die respectively and heating the inside and the outside together, the rubber material injected into the die cavity is ensured to have enough fluidity, and the rubber material cannot be pre-cooled and bonded near an injection hole to influence the injection of the rubber material.
Example 9
The manufacturing method of the one-time molding inflation-free hollow tire is further improved on the basis of the embodiment 7, in the third step, during injection, the material temperature is 60-100 ℃, the injection time is 5-30 s, and after injection, the tire stands for 10-30 s.
The injection temperature is guaranteed to be 60-100 ℃, the flowability of the rubber material during injection is guaranteed, further, the injection time is controlled within 5-30 s, the phenomenon that the subsequent injection is influenced by the fact that the rubber material is injected too slowly and molded in advance in a mold cavity is prevented, the tire is kept stand for 10-30 s after injection, and the tire is molded initially during the period.
Example 10
The method for manufacturing the one-time molding inflation-free hollow tire is further improved on the basis of the embodiment 7, and the vulcanization time of the seventh step is 50-800 s.
The vulcanization process of the embodiment is a conventional vulcanization process, the vulcanization time is controlled to be 50-800 s according to the size of the formed tire body 1, and the tire body 1 is directly integrated after being formed in the mold cavity and is not formed by combining after being preformed, so that the vulcanization time is shorter than the vulcanization time when the hollow tire is manufactured by the conventional process.
Example 11
The method for manufacturing the one-time molding inflation-free hollow tire is used for manufacturing the tire body 1 with the diameter of 200mm, and comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: installing a middle die 21 on a lower die 20 through an installation groove 201, closing an upper die 22 and the lower die 20, vacuumizing the cavity 200 after closing the dies, and heating to 150 ℃;
thirdly, injection: the plasticized fluid rubber is injected into the whole cavity 200 through an injection hole, the temperature of the injected material is 60 ℃, the injection time is 5s, and the injection is finished and then the injection is kept stand for 10s for molding;
fourthly, vulcanization: vulcanizing the rubber product in the cavity 200 for 50 s;
fifthly, opening the die: after vulcanization, the mold is opened, the molded carcass 1 is removed, and the middle mold 21 is removed from the open structure 11.
The yield of the carcass 1 manufactured by the manufacturing method of the embodiment reaches more than 96%.
Example 12
The method for manufacturing the one-time molding inflation-free hollow tire is used for manufacturing the tire body 1 with the diameter of 400mm, and comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: installing a middle die 21 on a lower die 20 through an installation groove 201, closing an upper die 22 and the lower die 20, vacuumizing the cavity 200 after closing the dies, and heating to 165 ℃;
thirdly, injection: the plasticized fluid rubber is injected into the whole cavity 200 through the injection hole, the temperature of the injected material is 75 ℃, the injection time is 15s, and the injection is finished and then the injection is kept stand for 15s for molding;
fourthly, vulcanization: vulcanizing the rubber product in the cavity 200 for 200 s;
fifthly, opening the die: after vulcanization, the mold is opened, the molded carcass 1 is removed, and the middle mold 21 is removed from the open structure 11.
The yield of the carcass 1 manufactured by the manufacturing method of the embodiment reaches more than 95 percent.
Example 13
The method for manufacturing the one-time molding inflation-free hollow tire is used for manufacturing the tire body 1 with the diameter of 560mm, and comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: installing a middle die 21 on a lower die 20 through an installation groove 201, closing an upper die 22 and the lower die 20, vacuumizing the cavity 200 after closing the dies, and heating to 175 ℃;
thirdly, injection: the plasticized fluid rubber is injected into the whole cavity 200 through the injection hole, the temperature of the injected material is 85 ℃, the injection time is 20s, and the injection is finished and then the injection is kept stand for 20s for molding;
fourthly, vulcanization: vulcanizing the rubber product in the cavity 200 for 450 s;
fifthly, opening the die: after vulcanization, the mold is opened, the molded carcass 1 is removed, and the middle mold 21 is removed from the open structure 11.
The yield of the carcass 1 manufactured by the manufacturing method of the embodiment reaches more than 94%.
Example 14
The method for manufacturing the one-time molding inflation-free hollow tire is used for manufacturing the tire body 1 with the diameter of 700mm, and comprises the following steps:
firstly, plasticizing: plasticizing the rubber particles into a fluid gum stock;
secondly, die assembly: installing a middle die 21 on a lower die 20 through an installation groove 201, closing an upper die 22 and the lower die 20, vacuumizing the cavity 200 after closing the dies, and heating to 200 ℃;
thirdly, injection: the plasticized fluid rubber is injected into the whole cavity 200 through an injection hole, the temperature of the injected material is 100 ℃, the injection time is 30s, and the injection is performed and then the injection is performed for 30 s;
fourthly, vulcanization: vulcanizing the rubber product in the cavity 200 for 800 s;
fifthly, opening the die: after vulcanization, the mold is opened, the molded carcass 1 is removed, and the middle mold 21 is removed from the open structure 11.
The yield of the carcass 1 manufactured by the manufacturing method of the embodiment reaches more than 90 percent.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (6)
1. The utility model provides an one shot forming exempts from to aerify hollow tyre, includes matrix (1), its characterized in that still includes:
the cavity structure (10) is arranged inside the tire body (1) along the circumferential direction, and a cavity chamber is formed inside the tire body (1); and
the opening structure (11) is a groove which is arranged on the inner ring surface of the tire body (1) along the circumferential direction, and the cavity structure (10) is communicated with the outside through the opening structure (11).
2. The one-shot, inflation-free hollow tire as claimed in claim 1, wherein: the opening width r of the opening structure (11) is gradually increased from the cavity structure (10) to the inner ring direction of the tire body (1).
3. The one-shot, inflation-free hollow tire as claimed in claim 1, wherein: the opening width r of the opening structure (11) is gradually reduced from the cavity structure (10) to the inner ring direction of the tire body (1).
4. A one-shot, non-pneumatic hollow tire as claimed in claim 1 or 2, wherein: the opening width r of the opening structure (11) is not more than 1/6 of the inner width L of the tire body (1).
5. A mold set for manufacturing the one-step forming inflation-free hollow tire as claimed in claims 1 to 4, comprising:
the lower die (20) is provided with a cavity (200) on the joint surface, and the shape of the cavity (200) is matched with that of the half carcass (1);
the middle mold (21) is composed of an inner cavity mold (210) and an opening mold (211), the inner cavity mold (210) is a ring-shaped structural body with the shape matched with that of the cavity structure (10), the opening mold (211) is a ring-shaped sheet with the shape matched with that of the opening structure (11), and the opening mold (211) is fixedly connected to the inner side of the inner cavity mold (210); the middle die (21) is arranged between the lower die (20) and the upper die (22);
the upper die (22) is matched with the lower die (20) in structure and is symmetrically arranged above the lower die (20);
and the injection hole is a through hole which is formed in the side wall of the lower die (20) or the upper die (22) and communicated with the cavity (200).
6. The mold set for manufacturing a one-shot non-pneumatic hollow tire as claimed in claim 5, wherein: an installation groove (201) is annularly formed in the joint surface on the inner side of the cavity (200) of the lower die (20), and the shape of the installation groove (201) is matched with that of an open die (211) of the middle die (21); the corresponding positions of the clamping surfaces of the upper die (22) are provided with the same mounting grooves (201).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921651780.0U CN210553955U (en) | 2019-09-27 | 2019-09-27 | One-step forming inflation-free hollow tire and mold set for manufacturing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921651780.0U CN210553955U (en) | 2019-09-27 | 2019-09-27 | One-step forming inflation-free hollow tire and mold set for manufacturing same |
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| CN210553955U true CN210553955U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775633A (en) * | 2020-07-14 | 2020-10-16 | 郁萍 | Tire with cavity support frame structure and machining method thereof |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111775633A (en) * | 2020-07-14 | 2020-10-16 | 郁萍 | Tire with cavity support frame structure and machining method thereof |
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Effective date of registration: 20210918 Address after: No. 305, group 2, caosi village, Picheng Town, Pizhou City, Xuzhou City, Jiangsu Province, 221300 Patentee after: Zhang Wenqiang Address before: 243000 Building 8, intelligent equipment Industrial Park, Yushan Economic Development Zone, Maanshan City, Anhui Province Patentee before: ANHUI WORLD VILLAGE INTELLIGENT EQUIPMENT Co.,Ltd. |
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