阅读说明：本技术 一种一次成型免充气中空轮胎及制作该轮胎的模具组及该轮胎的制作方法 (A kind of one-pass molding exempts to inflate hollow tire and makes the set of molds of the tire and the production method of the tire ) 是由 张文强 葛九敢 唐帆 高志宇 路丽珠 时守超 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种一次成型免充气中空轮胎及制作该轮胎的模具组及该轮胎的制作方法,属于轮胎加工领域。轮胎包括胎体,还包括空腔结构,其沿周向开设于所述胎体内部,在所述胎体内部形成中空腔室；以及开口结构,其为沿周向开设于所述胎体内圈面上的凹槽,所述开口结构将所述空腔结构与外界连通；通过上、中、下模具的配合,经塑化、合模、注射、硫化、开模,一次合模操作即可完成有中空结构的胎体的制作。本发明通过胎体结构的改进配合对应的模具组,使中空结构能一次性成型,且开口结构还减轻了胎体重量,进一步降低材料成本及轮胎滚阻,在不降低中空轮胎使用性能的前提下简化了制作工序,便于大批量制作且成品率高。(Exempt to inflate hollow tire the invention discloses a kind of one-pass molding and make the set of molds of the tire and the production method of the tire, belongs to tyre production field.Tire includes carcass, further includes cavity structure, is circumferentially opened in inside the carcass, forms hollow chamber inside the carcass；And hatch frame, for the groove being circumferentially opened on carcass inner ring face, the cavity structure is in communication with the outside by the hatch frame；By the cooperation of upper, middle and lower mold, through plasticizing, molding, injection, vulcanization, die sinking, the production of the carcass of hollow structure is can be completed in a die closing operation.The present invention cooperates corresponding set of molds by the improvement of carcass structure, enable hollow structure disposal molding, and hatch frame also reduces carcass weight, further decrease material cost and tire rolling resistance, production process is simplified under the premise of not reducing hollow tire service performance, convenient for high-volume production and high yield rate.)

1. a kind of one-pass molding exempts to inflate hollow tire, including carcass (1), which is characterized in that further include:

Cavity structure (10) is circumferentially opened in the carcass (1) inside, forms hollow chamber inside the carcass (1)； And

Hatch frame (11), for the groove being circumferentially opened on the carcass (1) inner ring face, the hatch frame (11) will The cavity structure (10) is in communication with the outside.

2. a kind of one-pass molding according to claim 1 exempts to inflate hollow tire, it is characterised in that: the hatch frame (11) opening width r is gradually increased from cavity structure (10) to carcass (1) inner ring direction.

3. a kind of one-pass molding according to claim 1 exempts to inflate hollow tire, it is characterised in that: the hatch frame (11) opening width r is gradually reduced from cavity structure (10) to carcass (1) inner ring direction.

4. a kind of one-pass molding according to claim 1 or 2 exempts to inflate hollow tire, it is characterised in that: the opening knot The opening width r of structure (11) is no more than the 1/6 of the carcass (1) inboard width L.

It makes one-pass molding described in Claims 1 to 4 5. a kind of and exempts to inflate the set of molds of hollow tire, which is characterized in that packet It includes:

Lower mold (20) offers type chamber (200) on land area, type chamber (200) shape and half of carcass (1) shape Shape matches；

Middle mold (21) is made of interior cavity mold (210) and opening mould (211), and the interior cavity mold (210) is shape and the sky The ring structure body that cavity configuration (10) shape matches, the opening mould (211) are shape and the hatch frame (11) shape The ring segment to match, the opening mould (211) are fixedly connected on the inside of the interior cavity mold (210)；The middle mold (21) is set It is intermediate in lower mold (20) and upper mold (22)；

Upper mold (22), structure match with the lower mold (20), and symmetrical expression is set to above the lower mold (20)；

Injection orifice is the through-hole for being provided with the lower mold (20) or upper mold (22) side wall and being connected to the type chamber (200).

It a kind of make one-pass molding 6. according to claim 5 and exempts to inflate the set of molds of hollow tire, it is characterised in that: institute It states annular on the land area on the inside of lower mold (20) type chamber (200) to offer mounting groove (201), the shape of the mounting groove (201) Shape and opening mould (211) shape of the middle mold (21) match；Upper mold (22) the land area corresponding position offers Identical mounting groove (201).

7. a kind of disposal molding exempts from the production method for inflating hollow tire, which is characterized in that steps are as follows:

One, it is plasticized: rubber grain is plasticized as flow-like sizing material；

Two, it molds: middle mold (21) being mounted on lower mold (20) by mounting groove (201), upper mold (22) and lower mold (20) it molds；

Three, it injects: flow-like sizing material after plasticizing being filled by entire type chamber (200) by injection orifice and stands molding afterwards；

Four, vulcanize: type chamber (200) interior rubber product is vulcanized；

Five, it is opened: being opened after the completion of vulcanization, take out molding carcass (1), middle mold (21) is taken from hatch frame (11) Out.

8. a kind of disposal molding according to claim 7 exempts from the production method for inflating hollow tire, it is characterised in that: step It is vacuumized after rapid two molding, is in negative pressure state in type chamber (200)；In clamping process, 150 is heated up to type chamber (200)~ 200℃。

9. a kind of disposal molding according to claim 7 exempts from the production method for inflating hollow tire, it is characterised in that: step When rapid three injections, material temperature is 60~100 DEG C, 5~30s of injection time, after injection, stands 10~30s.

10. a kind of disposal molding according to claim 7 exempts from the production method for inflating hollow tire, it is characterised in that: The time of step 4 vulcanization is 50~800s.

Technical field

The invention belongs to tyre production field, exempt to inflate hollow tire and system more specifically to a kind of one-pass molding Make the set of molds of the tire and the production method of the tire.

Background technique

Tire is divided into pneumatic tire and non-inflatable tyre, in view of current conventional pneumatic because itself production technology at Ripe, bradyseism and comfort of riding is good, load-bearing is good and is widely used.But with because of tyre explosion, abrasion and galloping And it is more and more to have caused a large amount of vehicle driving safety accident, non-inflatable tyre tubeless, itself with high security, energy conservation The advantages such as environmental protection and increasingly paid close attention to by people.Non-inflatable tyre is divided into solid tyre and hollow tire two major classes, hollow tire It largely solves in non-inflatable tyre ride and causes the defect jolted because of resilience deficiency.

Existing hollow tire is made of traditional molding sulfidization molding technique, and this technique is due to complex procedures itself Be difficult to realize full-automatic production, and larger by man's activity, therefore when carrying out tubeless tyre production, production efficiency it is low and Yield rate is low.

China Patent Publication No.: 109109352 A of CN；Publication date: on January 1st, 2019；Disclose a kind of rubber product Disposable injection, hollow and sulfidization molding production method, this method can complete injection, hollow and vulcanization in same die cavity Process, the die cavity include upper mold half, lower mold half and mold core, and mold core is that the hollow of die cavity lays the foundation, and are had after hollow Be filled with the condition of high temperature and high pressure gas required for vulcanizing, so will injection moulding, hollow and vulcanization plant it is integrated, keep away Heat losses caused by each process circulation in the prior art and process circulation cost are exempted from, although substantially improving traditional handicraft work The disadvantage of sequence complexity, simplifies production process, by the use to the technique, though finding the technique theoretically can realize entirely Automated production, but in the actual production process because of hollow tire sulfidization molding when, high-temperature gas or compressed air etc. need to be passed through Its inner cavity is heated, it is found that hollow tire yield rate is lower, while the occurrence of equipment such as high-temperature gas or compressed air being needed to run There are security risk and increase the responsible coefficient that product realizes technique in the process, therefore is difficult to realize large-scale industrial production.

Summary of the invention

1, it to solve the problems, such as

For the problem that the production of hollow inflation-free tire in the prior art is complicated, yield rate is low, the present invention provides one kind one Secondary molding exempts to inflate hollow tire and the production method of the set of molds and the tire that make the tire, passes through the improvement of carcass structure Cooperate corresponding set of molds and production method, make the carcass with hollow structure can with disposal molding convenient for high-volume And high yield rate.

2, technical solution

To solve the above problems, the present invention adopts the following technical scheme that.

A kind of one-pass molding exempts to inflate hollow tire, including carcass, further includes:

Cavity structure is circumferentially opened in inside the carcass, forms hollow chamber inside the carcass；And

Hatch frame, for the groove that is circumferentially opened on carcass inner ring face, the hatch frame is by the sky Cavity configuration is in communication with the outside.

The one-pass molding of this programme exempts to inflate hollow tire, and cavity structure is equipped with inside carcass, and cavity structure constitutes Tire it is hollow, in tire used, the impact force that this cavity structure transmits tyre surface carries out bumper and absorbing shock, reaches the effect on anti-mountain peak Fruit, and carcass weight is alleviated, reduce rolling resistance；Hatch frame is the opening being formed on carcass inner ring face, by cavity Structure is in communication with the outside, and by hatch frame, when can make tire building, after hollow structure molding, will directly be used in molding The mold core of hollow structure is extracted out from hatch frame, without reducing by the operation such as twice-die-opening, secondary mould closing, gas injection, pressure release Fault, accident rate, yield rate are improved, the tire of this programme structure, mold core are put into the set of molds of production tire After molding, after tire building, directly mold core extraction can be obtained, make hollow structure can be with disposal molding, and hatch frame Carcass weight is also reduced, material cost and tire rolling resistance is further decreased, makes under the premise of not reducing hollow tyre performance The hollow structure for obtaining non-inflatable tyre can be realized with disposal molding, convenient for high-volume production and high yield rate.

Further, the opening width r of the hatch frame is gradually increased from cavity structure to carcass inner ring direction.

The tire of this programme, the shape of hatch frame are shown as from carcass section from cavity structure to carcass inner ring direction In triangular form, so that mold core takes out operation and is easy to carry out after tire building, the intracorporal cavity structure of tire will not be damaged and opening is tied Structure, the high yield rate of hollow tire.

Further, the opening width r of the hatch frame is gradually reduced from cavity structure to carcass inner ring direction.

The tire of this programme, the shape of hatch frame are shown as from carcass section from cavity structure to carcass inner ring direction In inverted-triangular, the hatch frame of this programme after wheel rim installation, from carcass two side compressions of inside, matches shape with hatch frame At locking effect, the fastening effect between wheel rim and carcass is on the one hand enhanced, on the other hand, wheel rim compresses after-opening structure closure Closer, the air pressure release encountered when jolting in cavity structure in traveling is slower, reduces the deformation of tyre surface, and then enhance Road feel saves the consumption of driving force.

Further, the opening width r of the hatch frame is no more than the 1/6 of the carcass inboard width L.

The opening width r of hatch frame is bigger, and the taking-up of mold core operates easier progress, but excessive hatch frame holds Easily lead to carcass inner sidewall it is excessively thin so that wheel rim installation after, carcass inside structure is more easily damaged collapsing, cause tire without The opening width r control of hatch frame is no more than 1/6 Shi Kebao of the carcass inboard width L through testing by method normal use Under the conditions of normal wheel rim pressing force and tire applicable working condition, carcass inside structure will not be damaged card.

It is a kind of to make one-pass molding and exempt to inflate the set of molds of hollow tire, comprising:

Lower mold offers type chamber on land area, and the cavity shape matches with half of carcass shape；

Middle mold is made of interior cavity mold and opening mould, and the interior cavity mold is shape and the cavity structure shape phase The ring structure body matched, the opening mould are the ring segment that shape and the hatch frame shape match, and the opening mould is solid Surely it is connected on the inside of the interior cavity mold；The middle mold is placed among lower mold and upper mold；

Upper mold, structure match with the lower mold, and symmetrical expression is set to above the lower mold；

Injection orifice is the through-hole for being provided with the lower mold or upper mold side wall and being connected to the type chamber.

The injection orifice of this programme is provided with upper mold side wall, is connected to the type chamber on upper mold land area, and upper mold is under After mold clamping, type chamber constitutes the die cavity of complete carcass shape, and middle mold is placed between upper/lower die as mold core, middle mold Interior cavity mold be completely disposed at after molding in the die cavity that is formed, opening mould is partially disposed in die cavity, and part indwelling is convenient in outside die cavity Middle mold is taken out after carcass molding.

Further, annular offers mounting groove, the shape of the mounting groove on the land area of the intracavitary side of lower mould type The Oral incision of opening of shape and the middle mold matches；The upper mold land area corresponding position offers identical mounting groove.

On the land area of lower mold, the opening mould set-down location of middle mold offers mounting groove, facilitates in front of molding every time The placement of mold, middle mold hollow space are stuck in just by mounting groove on the land area part of protrusion, so that each middle mold Placement can be accurately positioned, further increase the qualification rate of production carcass product, guarantee product quality.

A kind of disposal molding exempts from the production method for inflating hollow tire, and steps are as follows:

One, it is plasticized: rubber grain is plasticized as flow-like sizing material；

Two, it molds: middle mold is mounted on lower mold by mounting groove, upper mold and lower mold clamping；

Three, it injects: standing molding after flow-like sizing material after plasticizing is filled entire type chamber by injection orifice；

Four, vulcanize: the intracavitary rubber product of type is vulcanized；

Five, it is opened: being opened after the completion of vulcanization, take out molding carcass, middle mold is taken out from hatch frame.

The disposal molding of this programme exempts from the production method for inflating hollow tire, by plasticizing, molding, injecting step, In Complete integrally formed carcass structure is obtained in die cavity in set of molds, the cavity structure of carcass also has become with hatch frame Type, the die cavity in set of molds keeps certain pressure and heats up to set of molds at this time, reaches the curing temperature of carcass, certain time The vulcanization of carcass is completed afterwards, at this point, the carcass in set of molds die cavity is the rubber structure of high-strength high-elasticity, die sinking, by carcass It is taken out from set of molds, struts carcass inner ring face, mold exempts to inflate carcass structure in taking-up to get to hollow.

Further, it is vacuumized after step 2 molding, intracavitary type is in negative pressure state；In clamping process, type chamber is added Temperature is to 150~200 DEG C.

Rubber mass can be easier injection and fill up die cavity when vacuum state in the die cavity of set of molds is facilitated injecting step, By respectively internal equipped with heating jointly inside and outside heating device to heating outside set of molds or upper/lower die, guarantee type chamber is everywhere Temperature reaches 150~200 DEG C, it is ensured that the rubber mass mobility for being injected into die cavity is enough, will not be pre-chilled that be bonded in injection orifice attached Recent photo rings the injection of rubber mass.

Further, when step 3 is injected, material temperature is 60~100 DEG C, 5~30s of injection time, after injection, standing 10~ 30s。

Guarantee injection temperature between 60~100 DEG C, it is ensured that the mobility of rubber mass during injection, further, this reality The injection time for applying example controls in 5~30s, prevents from injecting slow rubber mass and shifts to an earlier date shaping influence subsequent injections in die cavity, 10~30s is stood after injection, during this period the first one-step forming of tire.

Further, the time of step 4 vulcanization is 50~800s.Vulcanization time is controlled according to the size of shaped carcass 50~800s.

3, beneficial effect

Compared with the prior art, the invention has the benefit that

(1) one-pass molding of the invention exempts to inflate hollow tire, enables hollow structure can be with by the improvement of carcass structure Disposal molding, and hatch frame also reduces carcass weight, material cost and tire rolling resistance is further decreased, in not reducing Making the hollow structure of non-inflatable tyre under the premise of empty tire used performance can be realized with disposal molding, be made convenient for high-volume Work and high yield rate；

(2) one-pass molding of the invention exempts to inflate hollow tire, and the opening width r of hatch frame is from cavity structure to carcass Inner ring direction gradually increases, so that mold core takes out operation and is easy to carry out after tire building, will not damage the intracorporal cavity structure of tire With hatch frame, the high yield rate of hollow tire；

(3) one-pass molding of the invention exempts to inflate hollow tire, and the opening width r of hatch frame is from cavity structure to carcass Inner ring direction is gradually reduced, and after wheel rim installation, from carcass two side compressions of inside, matches to form locking effect with hatch frame, On the one hand the fastening effect between wheel rim and carcass is enhanced, on the other hand, wheel rim compresses after-opening structure and is closed closer, traveling In encounter when jolting in cavity structure air pressure release it is slower, reduce the deformation of tyre surface, and then enhance road feel, save The consumption of driving force；

(4) one-pass molding of the invention exempts to inflate hollow tire, the opening width r control of hatch frame is no more than described Carcass inboard width L 1/6 when can guarantee under the conditions of normal wheel rim pressing force and tire applicable working condition, carcass inside structure It will not be damaged；

(5) production one-pass molding of the invention exempts to inflate the set of molds of hollow tire, by the cooperation of upper, middle and lower mold, The production of the carcass of hollow structure can be completed in die closing operation, enormously simplifies the manufacture craft of hollow tire, operation It is convenient, high production efficiency；

(6) production one-pass molding of the invention exempts to inflate the set of molds of hollow tire, on the land area of lower mold, middle mould The opening mould set-down location of tool offers mounting groove, and the placement of middle mold, middle mold hollow space block just before convenient molding every time By the mounting groove on raised land area part, allows each middle mold that placement is accurately positioned, further increase production The qualification rate of carcass product guarantees product quality；

(7) disposal molding of the invention exempts from the production method for inflating hollow tire, injects vulcanization after primary molding The carcass of molding integrated hollow structure is directly obtained, simple process reduces production cost, and production is time-consuming short, production effect Rate is high, and since the carcass of production is integrated molding, uniformity, balance quality are high, and usage experience is good, and security performance is high；

(8) disposal molding of the invention exempts from the production method for inflating hollow tire, will be pumped into the die cavity of set of molds true Rubber mass can be easier injection and fill up die cavity when dummy status facilitates injecting step, by reaching the temperature heating of type chamber everywhere 150~200 DEG C, it is ensured that the rubber mass mobility for being injected into die cavity is enough, and will not be pre-chilled to be bonded near injection orifice influences rubber The injection of material；

(9) disposal molding of the invention exempts from the production method for inflating hollow tire, controls injection temperature at 60~100 DEG C Between, it is ensured that the mobility of rubber mass during injection, injection time control in 5~30s, prevent from injecting slow rubber mass in mould Intracavitary shaping influence subsequent injections in advance.

Detailed description of the invention

Fig. 1 is that one-pass molding of the invention exempts to inflate hollow tire structural schematic diagram；

Fig. 2 is that one-pass molding of the invention exempts to inflate hollow tire cross-sectional view；

Fig. 3 is the enlarged drawing of A in Fig. 2 of embodiment 3；

Fig. 4 is the enlarged drawing of A in Fig. 2 of embodiment 2；

Fig. 5 is that present invention production one-pass molding exempts to inflate the structural schematic diagram of the set of molds of hollow tire；

Fig. 6 is that present invention production one-pass molding exempts to inflate the structural schematic diagram of the set of molds of hollow tire；

Fig. 7 is that present invention production one-pass molding exempts to inflate the middle mold structure diagram of the set of molds of hollow tire；

Fig. 8 is that present invention production one-pass molding exempts to inflate the middle mold partial cutaway structural representation of the set of molds of hollow tire Figure；

Fig. 9 is that present invention production one-pass molding exempts to inflate the lower die structure schematic diagram of the set of molds of hollow tire

Figure 10 is the enlarged drawing of A in Fig. 2.

In figure:

1, carcass；10, cavity structure；11, hatch frame；

2, set of molds；20, lower mold；200, type chamber；201, mounting groove；21, middle mold；210, interior cavity mold；211, it is open Mould；22, upper mold.

Specific embodiment

The present invention is further described below with attached drawing combined with specific embodiments below.