Tire building machine and tire building method

Abstract

The invention provides a forming machine. The forming machine comprises a belt drum device provided with a belt drum and a tread feeding frame for conveying materials to the belt drum. The tread transfer ring is movably arranged on the sliding rail; the forming drum device is provided with a rotatable forming drum, and the forming drum is provided with an inflatable capsule; the tire body feeding frame is used for conveying materials to the forming drum, and the rolling device is arranged opposite to the forming drum; the tire bead presetting device is used for providing a tire bead; the two groups of tire body end part shrinking mechanisms, the two groups of ring buckling devices and the two groups of capsule boosting devices are movably arranged on the sliding rails, and the two groups of tire body end part shrinking mechanisms, the two groups of ring buckling devices and the two groups of capsule boosting devices are respectively arranged at the two ends of the forming drum. The one-step forming production of the tire is realized mainly through a newly designed forming machine, and the forming machine can be suitable for the production of tires with any crown height, and has the advantages of wide application range and high production efficiency.

Description

Technical Field

[0001] The invention relates to the field of tire molding equipment, in particular to a tire molding machine and a tire molding method for molding a green tire using a one-step method. Background Art

[0002] The existing one-step method of forming a green tire is to first flatly fit the carcass components (including the inner liner, carcass and sidewalls, etc.) that form the carcass assembly on a forming drum, then place the tire bead at a specified position on the forming drum, and during the inflation and shaping of the carcass assembly, the ends of the carcass components are turned up by a turn-up rod to cover the tire bead. The above-mentioned molding method can be applied to the production of tires with standard crown specifications, but for some tires with high crown specifications, the carcass components cannot be turned up during the inflation and shaping process due to the travel limit of the turn-up rod. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a tire forming machine, including a belt drum device provided with a belt drum, a tread supply rack for conveying materials to the belt drum; a slide rail, a tread transfer ring movably arranged on the slide rail; a forming drum device, the forming drum device is provided with a rotatable forming drum, and the forming drum is provided with an inflatable capsule; a carcass supply rack for conveying materials to the forming drum, and a rolling device arranged opposite to the forming drum; also includes a carcass presetting device for providing tire beads; two groups of carcass end contraction mechanisms movably arranged on the slide rail, two groups of buckle ring devices and two groups of capsule boosting devices, the two groups of carcass end contraction mechanisms, buckle ring devices and capsule boosting devices are respectively arranged at both ends of the forming drum.

[0004] The present invention also provides a tire molding method, based on the tire molding machine described in claim 1, providing tread components to the belt drum through a tread supply rack to form a tread assembly, and providing carcass components to a molding drum having two middle drums and two side drums through a carcass supply rack; the molding drum can be converted into an axial first extension state, an axial second extension state and an axial third extension state according to process requirements, the middle drum can be moved to a middle drum radial first extension position according to process requirements, and the side drum can be converted into a side drum radial contraction position, a side drum radial first extension position and a side drum radial second extension position according to process requirements; a carcass assembly is formed on a molding drum through a carcass forming method; the tread assembly is then transferred to the outside of the carcass assembly on the molding drum by a tread transfer ring, and in conjunction with the axial first extension state, the axial contraction state and the side drum radial second extension position of the molding drum, the tread assembly and the carcass assembly are composited on the molding drum through a composite molding method to form a raw tire.

[0005] The present invention mainly provides a new tire forming machine, so that the diameter of the forming drum is larger than the inner diameter of the tire bead to fit the first tire body component, the two ends of the first tire body component are radially contracted by the tire end contraction mechanism, so that the tire bead passes through the two ends of the first tire body component and is placed at the designated position of the first tire body component, the end of the first tire body component located on the bladder is reversed by inflating the bladder to cover the tire bead to form the second tire body component, and then the tire side is fitted, and the end of the side is completely fitted to the end of the second tire body component to form the tire body component by cooperating with the rolling device, and then the tire body component is inflated to fit the tire body component and the tread component to form the tire in one-step production, and tires of any crown height can be produced, and the tires produced have a larger cord density and higher strength than those produced by the traditional one-step method. In addition, by setting two sets of rotatable forming drums, production can be carried out simultaneously, thereby improving the product output speed on the forming drum; the tire forming machine described in the present invention has the advantages of wide production application range and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of a first embodiment of the tire building machine according to the present invention.

[0007] Figure 2 It is a schematic diagram of a second embodiment of the tire building machine according to the present invention.

[0008] Figure 3 It is an overall schematic diagram of the forming drum described in the present invention.

[0009] Figure 4 It is a main schematic diagram of the forming drum described in the present invention.

[0010] Figure 5 for Figure 4 The cross-sectional view along AA' shows that the forming drum is in an axially contracted state, the side drums are in a radially contracted position, and the middle drum is in a radially contracted position.

[0011] Figure 6 for Figure 4 The cross-sectional view along AA' shows that the forming drum is in the first axial extension state, the side drum is in the first radial extension position, and the middle drum is in the first radial extension position.

[0012] Figure 7 for Figure 4 The cross-sectional view along AA' shows that the forming drum is in the first axially extended state, the side drums are in the radially contracted position, and the middle drum is in the first radially extended position.

[0013] Figure 8 Bit Figure 4The cross-sectional view along AA' shows that the forming drum is in the fourth axial extension state, the side drums are in the radial contraction position, and the middle drum is in the first radial extension position.

[0014] Fig. 9 for Figure 4 The cross-sectional view along AA' shows that the forming drum is in the first axial extension state, the side drum is in the second radial extension position, and the middle drum is in the first radial extension position.

[0015] Fig.10 for Figure 4 The cross-sectional view along AA' shows that the forming drum is in the second axially extended state, the side drum is in the second radially extended position, and the middle drum is in the first radially extended position.

[0016] Fig.11 It is a schematic diagram of the side drum main body described in the present invention.

[0017] Fig.12 for Fig.11 A half-section view along BB', wherein the side drum is in a radially contracted position.

[0018] Fig.13 for Fig.11 A half-section view along BB', wherein the side drum is located in the first radially extended position of the side drum.

[0019] Fig.14 for Fig.11 A half-section view along line BB', wherein the side drum is located at the second radially extended position of the side drum.

[0020] Fig.15 It is a schematic diagram of the first middle drum according to the present invention.

[0021] Fig.16 It is a schematic diagram of the second middle drum according to the present invention.

[0022] Fig.17 for Fig.15 A half-section view along CC', wherein the middle drum is in a radially contracted position.

[0023] Fig.18 for Fig.15 A half-section view along CC', wherein the middle drum is located at the first radially extended position of the middle drum.

[0024] Figures 19 to 21 The figure is a working principle diagram of the tire building machine described in the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0026] like Figures 1 to 21As shown, the present invention discloses a tire forming machine 1, which is used for one-step forming production of green tires and can be applicable to the production of standard crown, high crown and low crown tires, and is not affected by the crown height of the tire.

[0027] The tire forming machine 1 of the present invention comprises a belt drum device 10 provided with a belt drum 11, and a tread supply rack 20 for providing materials to the belt drum 11, wherein the tread supply rack 20 can be subdivided into a plurality of sub-tread supply racks according to process requirements, each of which is used to provide the belt drum 11 with various tread components (including belts, cap bands and tread components, etc.) for forming a tread assembly 100, and the belts, cap bands and tread components, etc. are attached to the belt drum 11 to form the tread assembly 100; a slide rail 30, a tread transfer ring 41 movably arranged on the slide rail 30, and the tread transfer ring 41 is used to transfer the tread assembly 100; a forming drum device 5, wherein a rotatable forming drum 50 is arranged on the forming drum device 5, and an inflatable The present invention relates to a carcass feeding rack 60 for conveying materials to the forming drum 50, wherein the carcass feeding rack 60 can be subdivided into a plurality of carcass feeding racks according to process requirements, and each of the carcass components such as the carcass, the inner liner and the sidewall of the carcass assembly 200 are provided to the forming drum 50; the carcass presetting device 42 for providing the tire bead 300 is further provided, and the tire bead presetting device 42 is used to receive two groups of tire bead 300 delivered by a manual or mechanical structure; two groups of carcass end contraction mechanisms 71 movably arranged on the slide rail 30, and the two groups of carcass end contraction mechanisms 71 are respectively arranged at both ends of the forming drum 50, and are used to respectively contract the first carcass assembly 201 (the first carcass assembly 201 refers to the carcass components except the sidewall 203) in the radial direction. and two sets of bead buckling devices 72 movably arranged on the slide rail 30, the bead buckling devices 72 are used to receive the bead 300 on the bead presetting device 42, pass the bead 300 through the contracted ends of the above-mentioned first carcass component 201, and place the bead 300 at the specified position of the contracted first carcass component 201; two sets of capsule boosting devices 73 movably arranged on the slide rail 3, used to provide boosting force when the capsule 531 on the building drum 50 reverses the first carcass component 201 and the bead 300 to form the second carcass component 202 (the second carcass component 202 refers to the end of the first carcass component 201 reversed, and the bead 300 is covered to form the component); and the building drum 5 0, the rolling device 80 is arranged opposite to the tire body, the rolling device 80 is used to roll the laminated carcass second component 202 and the sidewall 203 to form the carcass component 200, and after the carcass component 200 is inflated and laminated with the tread component 100, the carcass component 200 and the tread component 100 are rolled to form a green tire; wherein the forming drum 50 is used to receive various carcass components to form the carcass first component 201, and to turn up the two ends of the carcass first component 201 with two tire beads 300 through the bladder 531 to form the carcass second component 202, and to receive the sidewall 203 to laminate on the carcass second component 202 to form the carcass component 200, and to laminate the carcass component 200 with the tread component 100 after the carcass component 200 is inflated and shaped.

[0028] By using the tire forming machine with the above structure, the diameter of the forming drum 50 is made larger than the inner diameter of the tire bead 300 to flatly fit the first tire body component 201, and then the two ends of the first tire body component 201 are radially contracted to facilitate the two tire beads 300 to pass through, and the two ends of the first tire body component 201 are turned up to wrap the tire bead 300 to form the second tire body component 202, and then the second tire body component 202 is flatly fitted with the sidewall 203 to form the tire body component 200, and then the tire body component 200 is inflated and fitted with the tread component 100 to form a raw tire. The production method can produce tires with any crown height, is not limited by the turn-up stroke, and the entire forming is completed on one forming drum 50, without the need to repeatedly replace the fitting drum, which can reduce invalid operations and improve production accuracy and efficiency. Moreover, in the conventional one-step tire forming machine, when the carcass components are bonded, the surface of the forming drum is lower than the inner diameter of the tire bead for bonding the carcass components; while in the one-step tire forming machine provided by the present invention, when the carcass components are bonded to form the first carcass assembly, the surface of the forming drum is higher than the inner diameter of the tire bead for bonding. Therefore, when producing tires of the same specification, the circumferential surface of the tire forming machine provided by the present invention can bond carcass components of a larger length, so that there are more tire cords in the carcass components, the cord density is also greater, the degree of expansion of the tire after molding is small, and the strength of the tire is higher.

[0029] like Figure 3 and 4 As shown, the forming drum 50 of the present invention includes a main shaft 51, a middle drum 52 and a side drum 53 slidably arranged on the main shaft 51, a plurality of middle drum support members 521 are arranged on the surface of the middle drum 52, the capsule 531 is arranged on the surface of the side drum 53, and the capsule 531 can be inflated and stretched toward the middle drum 52, wherein the middle drum 52 includes a first middle drum 52A and a second middle drum 52B arranged adjacent to each other, and the side drum 53 includes a first side drum 53A and a second side drum 53B axially arranged on the outer sides of the first middle drum 52A and the second middle drum 52B, that is, the first middle drum 52A and the second middle drum 52B are arranged between the first side drum 53A and the second side drum 53B; the middle drum 52 and the side drum 53 are movably arranged on the main shaft, and the first middle drum 52A and the second middle drum 52B can approach and separate from each other to form an axial contraction state and an axial first extension state of the forming drum (wherein the axial contraction state of the forming drum is as shown in FIG. 2 ). Figure 5 As shown, the length of the support surface formed by the two middle drums 52 is L1, and the side drum 53 and the middle drum 52 are arranged adjacent to each other, that is, the distance between the side drum 53 and the middle drum 52 is 0; the first axial extension state of the forming drum is Figure 6 , 7As shown in FIG. 9 , the length of the support surface formed by the separation of the two middle drums 52 is L2, and the side drums 53 and the middle drum 52 are arranged adjacent to each other), and the two side drums 53 can approach and separate relative to the two middle drums 52. When the two side drums 53 are separated relative to the two middle drums 52 at the same time, the second axial extension state of the forming drum and the third axial extension state of the forming drum are formed (the second axial extension state of the forming drum is as shown in FIG. Fig.10 As shown, the length of the support surface formed by the two middle drums 52 is L2, and the distance between the side drum 53 and the middle drum 52 is L3; the third axial extension state of the forming drum is that the length of the support surface formed by the two middle drums 52 is L2, and the distance between the side drum 53 and the middle drum 52 is L5, and the distance L5 is the distance between the corresponding turn-up ends of the second component 202 of the carcass); the middle drum 52 can be radially extended and retracted along the main axis, so that the middle drum support member 521 on the surface of the middle drum 52 is respectively located at the middle drum radial contraction position MW1 and the middle drum radial first extension position MW2, and the side drum 53 can be radially extended and retracted along the main axis, so that the capsule 531 on the surface of the side drum is respectively located at the side drum radial contraction position EW1, the side drum radial first extension position EW2 and the side drum radial second extension position EW3. The first radial extension position MW2 of the middle drum and the first radial extension position EW2 of the side drum are at the same level, the radial contraction position MW1 of the middle drum and the radial contraction position EW1 of the side drum can be at the same level or at different levels according to process requirements, and the second radial extension position EW3 of the side drum is higher than the first radial extension position EW2 of the side drum. The following description only takes the example that the radial contraction position MW1 of the middle drum and the radial contraction position EW1 of the side drum are at the same level.

[0030] like Figures 12 to 13 As shown, a plurality of capsule support members 532 are arranged on the circumference of the side drum 53, and the plurality of capsule support members 532 are evenly arranged along the circumference of the side drum 53. The outer surface of the capsule support member 532 is an arc surface, and a tire bead positioning groove 324 is arranged on one end of the capsule support member 532 close to the middle drum 52. The tire bead positioning groove 324 is used to position the tire bead 300. The outer surfaces of the plurality of capsule support members 532 form an approximately complete circumferential surface, and the capsule 531 is arranged outside the circumferential surface. The end of the capsule is arranged on one end of the capsule support member 532 close to the middle drum 52. When the capsule 531 is inflated, the capsule 531 expands toward the direction of the middle drum 52; as shown in FIG. Figure 3 As shown, the forming drum 50 further includes a first rotation driving source 54 that can drive the main shaft 51. The main shaft 51 is driven to rotate by the first rotation driving source 54, thereby driving the middle drum 52 and the side drum 53 to rotate synchronously to fit the various parts of the carcass. The forming drum 50 further includes a first driving device 55, which can drive the middle drum 52 and the side drum 53 to move in the axial direction of the main shaft 51.

[0031] like Figure 5As shown, when the forming drum 50 is in an axially contracted state, it is used to inflate and shape the carcass assembly 200 that is attached to the surface of the middle drum 52 and the side drum 53; Figure 6 and 19 As shown in a, when the forming drum 50 is in the first axially extended state, it is used to bond various carcass components except the sidewall 203 on the surface of the middle drum 52 and the side drum 53 to form a first carcass assembly 201; Fig.10 and 20 As shown in FIG. 1 , when the forming drum 50 is in the second axially extended state, the rolling device 80 is convenient to extend into the edge of the middle drum 52 close to the side drum 53 to press the sidewall 203 attached to the second carcass component 202 to form the carcass component 200; Fig. 20 As shown in FIG. 5 , when the forming drum 50 is in the third axial extension state, the side drum 53 is in contact with the end of the carcass second component 202 on the middle drum 52 that has completed the end wrapping, so as to facilitate the lamination of the sidewall 203. Figure 5 As shown, when the side drum 53 is located at the side drum radial contraction position EW1 and the middle drum is located at the middle drum radial contraction position MW1, the bladder 531 of the side drum and the middle drum support 521 of the middle drum are at the same diameter D1, or at different diameters, for unloading the green tire after production; Figure 6 and 19 As shown in a, when the side drum 53 is located at the first radial stretch position EW2 of the side drum, and the middle drum 52 is located at the first radial stretch position MW2 of the middle drum, that is, the bladder 531 of the side drum and the middle drum support 521 of the middle drum are at the same diameter height D2, which are used to bond various carcass components except the sidewall 203 to form the first carcass assembly 201, and the various carcass components except the sidewall 203 are bonded to the surfaces of the middle drum 52 and the side drum 53, that is, the middle drum support 521 of the middle drum and the bladder 531 of the side drum; as shown in FIG. Figure 7 As shown in 19c to 20e, when the middle drum 52 is located at the middle drum radial first extended position MW2 and the side drum 53 is located at the side drum radial contracted position EW1, that is, the diameter D1 of the side drum 53 is smaller than the diameter D2 of the middle drum 52, the tire bead 300 is placed on the tire bead 300, and the bladder 531 of the side drum is inflated so that the first tire body component 201 is turned up to wrap the tire bead 300 to form the second tire body component 202; Fig. 9 and 20As shown in FIG. 5 , when the middle drum 52 is located at the middle drum radial first stretching position MW2 and the side drum 53 is located at the side drum radial second stretching position EW3, the bladder 531 of the side drum and the upper surface of the carcass second component 202 located on the middle drum are at the same diameter D3, that is, the bladder 531 and the upper surface of the carcass second component 202 are at the same height or on a plane approximately at the same height, and are used to fit the sidewall 203, so that the sidewall 203 fits on the bladder 531 and the carcass second component 202 at the same height or approximately at the same height. The tire is formed in one step by the coordination of the position and state between the middle drum 52 and the side drum 53 in the axial contraction state, the axial first stretching state, the axial second stretching state, the axial third stretching state, the middle drum radial contraction position MW1 and the middle drum radial first stretching position MW2, the side drum radial contraction position EW1, the side drum radial first stretching position EW2 and the side drum radial second stretching position EW3.

[0032] like Figures 11 to 14 As shown, the side drum 53 of the present invention includes a circular side drum body 533, the side drum body 533 has a side drum body outer surface 331, and also includes a first moving member 534 slidably sleeved on the side drum body outer surface 331, the first moving member 534 can move axially along the side drum body outer surface 331, and also includes a plurality of side drum supporting members 536 that can move radially along the side drum body 533 through a guide mechanism 535, and the plurality of side drum supporting members 536 are evenly arranged along the circumferential direction of the side drum, and the capsule supporting member 532 is arranged on the side drum In addition to the support component 536, it also includes a movement conversion mechanism 537 connecting the first moving member 534 and the plurality of side drum support components 536, and a side drum radial driving mechanism 538 driving the first moving member 534 to move. When the side drum radial driving mechanism 538 drives the first moving member 534 to move in the axial direction of the side drum body 533, the side drum support component 536 is moved relative to the side drum body 533 in the radial direction of the side drum through the movement conversion mechanism 537, so as to realize the radial extension and contraction of the side drum, and the side drum is respectively moved in the adjacent Fig.12 The side drum radial contraction position EW1, attached Fig.13 The side drum is shown in the first radial extension position EW2 and the attached Fig.14 The side drum is shown to be telescopically extended between a second radial extension position EW3.

[0033] Preferably, the movement conversion mechanism 537 includes a plurality of first inclined surfaces 341 evenly arranged along the circumference of the first moving member 534, a plurality of side drum supporting components 536 are arranged opposite to the plurality of first inclined surfaces 341, and also includes a second inclined surface 361 arranged on the side drum supporting component 536 opposite to the corresponding first inclined surface 341, the first inclined surface 341 of the first moving member is parallel to the second inclined surface 361 of the side drum supporting component, that is, the angle formed by the first inclined surface 341 of the first moving member and the horizontal direction is the same as the angle formed by the second inclined surface 361 of the side drum supporting component and the horizontal direction, and also includes a first moving component 373 respectively arranged on the first inclined surface 341 of the first moving member and the second inclined surface 361 of the side drum supporting component, the first moving component includes a first slide rail 3731 and a first slider 3732, the first slide rail 3731 is fixedly arranged on the second inclined surface 361, and the first slider 3732 is fixedly arranged on the first inclined surface 341. Through the above arrangement, when the side drum radial driving mechanism 538 drives the first movable member 534 to move axially along the outer surface 331 of the side drum body, it drives a number of first sliders 3732 respectively arranged on a number of first inclined surfaces 341 of the first movable member to move simultaneously, and the first slider 3732 moves on the first slide rail 3731 arranged on the second inclined surface, thereby driving a number of side drum supporting components 536 to move simultaneously along the radial direction of the side drum.

[0034] The guide mechanism 535 includes a side drum end component 351 fixedly arranged at one end of the side drum body 533, the side drum end component 351 is annular, and has an annular inner surface 3511, the annular inner surface 3511 of the side drum end component is perpendicular to the outer surface 331 of the side drum body, a plurality of protrusions 352 are arranged on the annular inner surface 3511, and a T-shaped guide groove 353 is formed between the protrusions, and also includes a T-shaped structure 354 arranged at one end of the side drum support component 536, the T-shaped structure 354 is coupled with the T-shaped guide groove 353, and the side drum support component 536 can move along the annular inner surface 3511 of the side drum end component through the T-shaped guide groove 353. The side drum support component 536 can only move along the radial direction of the side drum 53 through the above-mentioned guide mechanism 535. The side drum end component 351 and the side drum body 533 can be arranged in one piece or separately.

[0035] Preferably, the side drum radial driving mechanism 538 includes a secondary expansion component 381 slidably arranged on the outer surface 331 of the side drum body, the secondary expansion component 381 is fixedly arranged with the first movable member 534, the secondary expansion component 381 has a first opening 3811 facing the first movable member 534, the first movable member 534 has a second opening 342 facing the secondary expansion component 381, the first opening 3811 of the first movable member, the second opening 342 of the secondary expansion component and the outer surface 331 of the side drum body form a sealed side drum chamber, and also includes a first side drum piston dividing component 383 fixedly arranged on the outer surface 331 of the side drum body, and a second side drum piston dividing component 384 slidably arranged on the outer surface 331 of the side drum body, the first side drum piston dividing component 383 and the second side drum piston dividing component 384 divides the above-mentioned sealed side drum chamber into a first side drum chamber 385, a second side drum chamber 386, and a third side drum chamber 387 which are relatively sealed respectively. The first side drum chamber 385, the second side drum chamber 386 and the third side drum chamber 387 all have independent air passages (not shown) connected to an air source (not shown). The end of the first movable member 534 protrudes from the secondary expansion component 381 in the side drum chamber to form a blocking portion 388. The blocking portion 388 is between the second side drum chamber 386 and the third side drum chamber 387, and is used to block the sliding of the second side drum piston partition component 384 on the outer surface 331 of the side drum body, that is, during the process of the second side drum piston partition component 384 moving from the first side drum chamber 385 to the second side drum chamber 386, it cannot continue to move after moving to the position of the blocking portion 388. The secondary expansion component 381 of the present invention can be integrally or separately arranged with the first moving member 534, and the first side drum piston segmentation component 383 can be integrally or separately arranged with the side drum main body outer surface 331. The above-mentioned blocking portion 388 is formed by the end of the first moving member 534 protruding the secondary expansion component 381 in the side drum chamber. Of course, the blocking portion 388 independently arranged on the first moving member 534 or the secondary expansion component 381 can also be formed to block the movement of the second side drum piston segmentation component 384.

[0036] It should be noted that when the tire carcass components described in the present invention are attached to the forming drum 50, they are completely attached to the middle drum support 521 of the middle drum, and attached to one end of the side drum 53 close to the middle drum 52. If the side drum 53 is in the state of being stretched in the first radial stretching position EW2 and the second radial stretching position EW3 of the side drum, and there is a relatively large gap in the axial direction on the circumferential surface of the side drum 53 and it cannot support the tire carcass components, it will affect the tire forming quality. Therefore, in order to solve the above technical problems, such as Fig.11As shown, preferably, the capsule support member 532 of the present invention has a first support side portion 321 and a second support side portion 322, the first support side portion 321 and the second support side portion 322 are continuous teeth or waveforms, and the first support side portion 321 and the second support side portion 322 can be coupled. When the side drum 53 is in the radial contraction position EW1 of the side drum, the second support side portions 322 and the first support side portions 321 of the two adjacent capsule support members can be coupled and completely contacted to form a nearly complete circular surface without a gap; through the coupled and waveform or toothed second support side portions 322 and the first support side portions 321, when the side drum 53 is in the second radial extension position EW3 of the side drum, although there is a gap between the two adjacent capsule support members 532, the two adjacent meshing capsule support members 532 make the circumferential surface of the side drum 53 without continuous support in the axial direction minimized, so that when the various carcass components are attached, the various carcass components can be supported to the greatest extent.

[0037] When the forming drum 50 of the present invention is inflated to the carcass assembly 200, it is necessary to ensure that both ends of the middle drum 52 are sealed. Figures 10 to 12 As shown, preferably, the capsule 531 of the side drum of the present invention comprises a capsule body 311 arranged on a capsule supporting member, a capsule side end 312 vertically connected to the capsule body 311, and the capsule side end 312 is fixedly arranged on the end of the side drum 53 close to the middle drum 52 away from the end connected to the capsule body, and is specifically fixedly arranged on the side drum end member 351 of the side drum, and the side drum 53 is sealed close to the middle drum 52 by the capsule side end 312 and the side drum end member 351. When the forming drum 50 is in an axially contracted state to inflate and shape the carcass assembly 200 located on the surface of the middle drum, the capsule side end 312 is located between the middle drum 52 and the side drum 53, so that an approximately sealed space is formed between the two middle drums 52 and the capsule side end 312, the side drum end member 351 and the main shaft 51, so that gas will not leak from the side drum, and the carcass assembly 200 can be better inflated.

[0038] Due to the process of the tire bead being turned up at the end of the first tire component 201, part of the first tire component 201 needs to be close to the end of the middle drum 52, that is, the end of the middle drum support 521. Therefore, in order to realize the turning up of the first tire component 201 and prevent the first tire component 201 from being punctured during the turning up process, the end of the middle drum 52 needs to be set in an arc shape. Therefore, when the side drum 53 and the middle drum 52 are set adjacent to each other for bonding the various tire components, the bladder 531 of the side drum and the middle drum support 521 of the middle drum are not completely connected, because there is a concave part due to the arc setting of the middle drum end. When the tire components are bonded on the middle drum 52 and the side drum 53, there is no support for the tire components at the position of the aforementioned concave part, so the tire components may not be completely bonded and bubbles may exist, thereby affecting the quality of the tire. Therefore, in order to solve the above technical problems, the capsule 531 described in the present invention also includes a connecting portion 313 connected to the capsule body 311 and close to one end of the middle drum 52. The connecting portion 313 is on the same horizontal plane as the capsule body 311 and is in contact with the middle drum 52, and is arranged in an arc shape with the end of the middle drum. When the forming drum 50 is in the first axial extension state, the connecting portion 313 is completely connected to the middle drum support 521 on the surface of the middle drum to form a continuous and uninterrupted plane, and is arranged in full contact with the end of the middle drum. When the forming drum 50 is in the first axial extension state and the carcass parts are being bonded, the continuous plane formed by the connecting portion 313 of the capsule and the middle drum support 521 can better support the bonding of the carcass parts.

[0039] The working principle of the side drum radial driving mechanism 538 driving the side drum 53 to extend and retract between the side drum radial contraction position EW1, the side drum radial first extension position EW2 and the side drum radial second extension position EW3 is as follows: Fig.12 As shown, when the side drum 53 is in the side drum radial contraction position EW1, the first moving member 534 is close to the first side drum piston partition component 383, that is, the first side drum chamber 385 reaches the minimum; Fig.13As shown, when the side drum 53 is to reach the first radial extension position EW2 of the side drum, gas is first filled into the third side drum chamber 387 to push the second side drum piston partition component 384 to slide to the blocking portion 388 position, so that the third side drum chamber 387 reaches its maximum; then gas is filled into the first side drum chamber 385, so that the secondary expansion component 381, the first moving member 534 and the second side drum piston partition component 384 slide together on the outer surface 331 of the side drum body, so that the second side drum piston partition component 384 is close to the first side drum piston partition component 383, and the second side drum chamber 386 reaches its minimum; due to the side drum support portion The first movable member 536 can only move radially along the side drum 53 through the guide mechanism 535. When the first movable member 534 moves toward the side drum supporting member 536, the inclined first slider 3732 moves on the first slide rail 3731 in a direction relatively close to the side drum supporting member 536, thereby driving the side drum supporting member 536 to move along the radial direction of the side drum in a direction away from the side drum axis X2, and driving the capsule supporting member 532 and the capsule 531 arranged on the side drum supporting member 536 to move synchronously along the radial direction of the side drum in a direction away from the side drum axis X2, so that the side drum 53 reaches the first radial extension position EW2 of the side drum; Fig.14 As shown, when the side drum 53 is to reach the second radial extension position EW3 of the side drum, the gas in the third side drum chamber 387 is extracted, and the first side drum chamber 385 is further filled with gas, so that the secondary expansion component 381 and the first movable member 534 further slide on the outer surface 331 of the side drum body, so that the secondary expansion component 381 is completely in contact with the second side drum piston dividing component 384. At this time, the third side drum chamber 387 and the second side drum chamber 386 are both at their minimum, and the first side drum chamber 385 is at its maximum; when the first movable member 534 is further in In the process of moving on the outer surface 331 of the side drum body toward the side drum supporting component 536, the inclined first slider 3732 moves further on the first slide rail 3731 toward the direction close to the side drum supporting component 536, thereby driving the side drum supporting component 536 to further move along the radial direction of the side drum toward the direction away from the side drum axis X2, and driving the capsule supporting component 532 and the capsule 531 arranged on the side drum supporting component 536 to move synchronously along the radial direction of the side drum toward the direction away from the side drum axis X2, so that the side drum 53 reaches the second radial extension position EW3 of the side drum.

[0040] Furthermore, if Fig.11As shown, the capsule support member 532 of the present invention is provided with a reset groove 323 along the circumferential direction of the side drum, and the reset grooves 323 on the capsule support member form an approximately annular groove, and also includes an annular first elastic reset element 539, which is arranged in the annular groove. When the side drum 53 is in the side drum radial contraction position EW1, the first elastic reset element 539 is in a natural state, and when the side drum 53 is in the side drum radial first extension position EW2 and the side drum radial second extension position EW3, the first elastic reset element 539 is in an extension state, and has an elastic restoring force on the capsule support member 532 toward the side drum axis X2. When the side drum 53 returns from the side drum radial second extension position EW3 to the side drum radial first extension position EW2, and from the side drum radial first extension position EW2 to the side drum radial contraction position EW1, the first elastic reset element 539 is used to help the side drum 53 return to the side drum radial first extension position EW2 and the side drum radial contraction position EW1. Preferably, the first elastic reset element 539 is a ring-shaped spring.

[0041] like Figures 15 to 18 As shown, the middle drum 52 of the present invention includes a middle drum body 522, the middle drum body 522 has a middle drum body outer surface 221, a second moving member 523 slidably arranged on the middle drum body outer surface 221, and also includes a middle drum end component 524 fixedly arranged with the middle drum body 522, the middle drum end component 524 has a circular middle drum end surface 241, the middle drum end surface 241 is perpendicularly arranged with the middle drum body outer surface 221, and also includes a plurality of middle drum connecting members 525 arranged along the radial direction of the middle drum, the middle drum connecting member 525 is movably arranged on the middle drum through a second moving assembly (a second slide rail 261 and a second slider 262, wherein the second slide rail 261 is fixedly arranged on the middle drum connecting member 525, and the second slider 262 is fixedly arranged on the middle drum end component 524). On the middle drum end surface 241 of the middle drum end component, several middle drum connecting members 525 are hingedly arranged on the circumference of the second movable member 523, and one end of the middle drum connecting member 525 away from the second movable member 523 is connected to the middle drum supporting member 521, and also includes a middle drum radial driving mechanism 527 that can drive the second movable member 523 to move along the outer surface 221 of the middle drum body. The middle drum radial driving mechanism 527 drives the second movable member 523 to move on the outer surface 221 of the middle drum body, thereby driving several middle drum connecting members 525 to synchronously approach the middle drum body 522 or move away from the middle drum body 522, and driving several middle drum supporting members 521 connected to the middle drum body 522 to synchronously move in the direction of approaching the middle drum body 522 or moving away from the middle drum body 522, so as to realize the middle drum 52 in the vicinity. Fig.17 The radial contraction position MW1 of the middle drum and the attached Fig.18 The middle drum shown is telescopic between the first radial extension position MW2.

[0042] Preferably, the middle drum connecting member 525 is hingedly connected to the second movable member 523 through a connecting rod 528, one end of the connecting rod 528 is hingedly provided on the circumference of the second movable member 523, and the other end of the connecting rod 528 is hingedly provided at the middle position of the middle drum connecting member 525. The position on the middle drum body 522 close to the connection with the middle drum end component 524, the middle drum end surface 241 and the second movable member 523 form an accommodating space 529 for accommodating the middle drum connecting member 525. When the second movable member 523 moves on the middle drum body 522, the connecting rod 528 drives a plurality of middle drum connecting members 525 to move on the middle drum end surface 241 in the accommodating space 529, thereby realizing the conversion of the movement of the second movable member 523 in the axial direction of the middle drum into the movement of the middle drum connecting member 525 in the radial direction of the middle drum.

[0043] The middle drum radial driving mechanism 527 described in the present invention includes a sleeve 271 slidably arranged on the middle drum main body 522, the sleeve 271 having a sleeve body 2711 and a sleeve protrusion 2712 close to the second movable member 523, the sleeve protrusion 2712 can slide on the outer surface of the second movable member 523; the second movable member 523 has a vertically arranged movable member body 231 and a middle drum piston partition 232, the sleeve protrusion 2712, the sleeve body 2711, the second movable member 523 and the outer surface 221 of the middle drum main body form a middle drum first chamber 272 and a middle drum second chamber 273 divided by the middle drum piston partition 232 of the second movable member, and the middle drum first chamber 272 and the middle drum second chamber 273 respectively have air ducts (not shown) connected to the air source (not shown).

[0044] like Fig.17 and 18 As shown, the working principle of the middle drum 52 of the present invention for extending and retracting between the middle drum radial contraction position MW1 and the middle drum radial first extension position MW2 is as follows: when the middle drum 52 is at the middle drum radial contraction position MW1, the middle drum piston partition 232 is close to the shaft sleeve 271 in the axial direction of the middle drum, and the middle drum connecting member 525 is close to the middle drum body 522 in the accommodating space 529; when the middle drum 52 is to be made to reach the middle drum radial first extension position MW2, gas is filled into the middle drum second chamber 273 to push the second moving part 274 to move the middle drum 522 to the middle drum radial first extension position MW2. Part 523 moves toward the direction approaching the middle drum end part 524, so that the space of the second chamber 273 of the middle drum becomes larger and the space of the first chamber 272 of the middle drum becomes smaller; the second moving part 523 pushes the middle drum connecting part 525 on the middle drum end part 524 through the connecting rod 528 to move in the direction away from the middle drum axis X3, and further drives a plurality of middle drum supporting parts 521 to move synchronously in the radial direction of the middle drum in the direction away from the middle drum axis X3, so that the middle drum 52 reaches the first radial extension position MW2 of the middle drum.

[0045] like Fig.16 and18 As shown, preferably, the middle drum connecting member 525 and the middle drum supporting member 521 of the present invention are connected through a middle drum support block 251, and the middle drum support block 251 is provided with an arc groove 2511, and also includes a circular ring-shaped second elastic reset element 252, and the second elastic reset element 252 is arranged in the arc groove 2511 of a plurality of middle drum support blocks. The second elastic reset element 252 is used to assist the middle drum 52 to return from the middle drum radial first extension position MW2 to the middle drum radial expansion position MW1. Preferably, the second elastic reset element 252 is a circular ring spring.

[0046] like Figure 4 , 15 As shown in Figure 16, it should be noted that the first middle drum 52A described in the present invention has a plurality of first middle drum support members 521A, and the second middle drum 52B has a plurality of second middle drum support members 521B. The outer diameters formed by the plurality of first middle drum support members 521A and the plurality of second middle drum support members 521B are consistent, and the first middle drum support members 521A and the second middle drum support members 521B can be arranged in meshing engagement, so that when the forming drum 50 is in the axial contraction state, the axial first extension state and the axial second extension state, the circumferential surface formed by the first middle drum 52A and the second middle drum 52B always supports the carcass components in the radial direction, and the first middle drum 52A and the second middle drum 52B will not be completely separated during the separation process, that is, the circumferential surface formed by the first middle drum 52A and the second middle drum 52B will not be completely disconnected in the radial direction.

[0047] Preferably, the first middle drum support 521A has a notch 211A that does not penetrate in the direction close to the middle drum axis X3, and the second middle drum support 521B has a toothed portion 211B that is meshed with the notch 211A on the first middle drum support. When the first middle drum 52A and the second middle drum 52B approach each other, the toothed portion 211B of the second middle drum support moves in the notch 211A on the first middle drum support, so that the first middle drum 52A and the second middle drum 52B do not interfere with each other; when the first middle drum 52A and the second middle drum 52B move away from each other, the toothed portion 211B of the second middle drum support moves on the notch 211A of the first middle drum support, and the toothed portion 211B of the second middle drum support is always partially in the notch 211A of the first middle drum support, so that the second middle drum support 521B of the second middle drum and the first middle drum support 521A of the first middle drum are not completely disconnected. Furthermore, the notch 211A on the first middle drum support supports the toothed portion 211B on the second middle drum support, so that during the process of laminating the tire carcass components, the middle drum surface can better support the tire carcass components, thereby improving the tire molding quality.

[0048] like Figure 3 As shown, the forming drum 50 described in the present invention also includes a main shaft seat 56, the main shaft 51 is rotatably arranged on the main shaft seat 56, the first rotation driving source 54 is fixedly arranged on the main shaft seat 56, and the driving end of the first rotation driving source 54 is connected to the main shaft 51 through a first transmission device 5411 (a combination of a synchronous wheel and a synchronous belt).

[0049] like Figure 3 and 4 As shown, the first driving device 55 described in the present invention includes an inner shaft 551 sleeved in the main shaft 51, and a first inner sleeve 552 sleeved outside the inner shaft 551, the inner shaft 551 is fixedly connected to the second side drum 53B, the first inner sleeve 552 is fixedly connected to the first side drum 53A, and also includes a first movable driving source 553 that can simultaneously drive the inner shaft 551 and the first inner sleeve 552 to move axially toward or in the opposite direction along the forming drum 50, the first movable driving source 553 is fixedly arranged on the main shaft seat 56, and the driving end of the first movable driving source 553 is respectively connected to the inner shaft 551 and the first inner sleeve 552 through a second rotating device. Specifically, the second transmission device includes a first screw rod 541 with threads at both ends arranged in opposite directions, and two groups of first screw rod nuts (not shown) respectively threadedly connected to the two ends of the first screw rod, and the two groups of the first screw rod nuts are respectively fixedly connected to the inner shaft 551 and the first inner sleeve 552 through the first connecting member 542 and the second connecting member 543. When the first moving drive source 553 drives the first screw rod 541 to rotate, the two groups of first screw rod nuts are driven to move relatively closer or farther away, thereby driving the inner shaft 551 and the first inner sleeve 552 to move toward or in the opposite direction, and further driving the second side drum 53B and the first side drum 53A respectively connected to the inner shaft 551 and the first inner sleeve 552 to move relatively closer or farther away.

[0050] In order to better realize the axial movement of the inner shaft 551 and the first inner sleeve 552 along the forming drum 50, the first connecting member 542 and the second connecting member 543 are movably arranged on the main shaft seat 56 through the third moving component 555 (a combination of a slide rail and a slider), and the third moving component 555 is arranged along the axial direction of the forming drum 50. When the first moving driving source 553 drives the first connecting member 542 and the second connecting member 543 to move, the first connecting member 542 and the second connecting member 543 will only move along the axial direction of the forming drum 50 through the guidance of the third moving component 555, so that the inner shaft 551 and the first inner sleeve 552 will only move along the axial direction of the forming drum 50, and the radial movement of the forming drum 50 will not occur.

[0051] Similarly, in order to achieve the relative approach or distance between the two middle drums 52, the first driving device 55 of the present invention further includes a second inner sleeve 556 and a third inner sleeve 557 sleeved between the inner shaft 551 and the first inner sleeve 552, wherein the third inner sleeve 57 is sleeved outside the second inner sleeve 556, the second inner sleeve 556 is fixedly connected to the second middle drum 52B, and the third inner sleeve 557 is fixedly connected to the first middle drum 52A, and further includes a second movable driving source 558 that can simultaneously drive the second inner sleeve 556 and the third inner sleeve 557 to move toward or in the opposite direction along the axial direction of the forming drum 50, the second movable driving source 558 is fixedly arranged on the main shaft seat 56, and the driving end of the second movable driving source 558 is respectively connected to the second inner sleeve 556 and the third inner sleeve 557 through a third transmission device (not shown). The structure of the third transmission device is the same as that of the second transmission device, and will not be repeated here.

[0052] like Figure 8 , 19 As shown in Figs. 19b to 19d, it should be noted that, when the first carcass component 201 is attached to the forming drum 50 and the end of the first carcass component 201 is turned up to form the tire bead 300 to form the second carcass component 202, if the bladder 531 is inflated to realize the first carcass component 201 to turn up the tire bead 300, the side drum 53 and the middle drum 52 are at the same adjacent level, and the turning-up effect may be poor when the bladder 531 is inflated to turn up, and bubbles may appear between the first carcass component 201 and the tire bead 300. Because in order to better turn up the tire bead 300 at the end of the first carcass component 201 when the bladder 531 is inflated, the two side drums 53 can be simultaneously extended into the middle drum 52 in the axial direction to form the fourth axial extension state of the forming drum 50, so that the end of the bladder is located below the tire bead 300 or below the middle drum 52. At this time, the length of the support surface formed by the two middle drums 52 is L2, and the overlapping length of the middle drum 52 and the side drum 53 is L4. When the bladder 531 is inflated, the end of the first carcass component 201 is completely in contact with the surface of the bladder 531 , and the bladder 531 forms a C-shaped wrapping and extrusion on the end of the first carcass component 201 , so that the first carcass component 201 completely covers the tire bead 300 .

[0053] like Fig.19As shown in FIG. 2 b, the tire end contraction mechanism 71 of the present invention comprises a plurality of finger-shaped pieces 711 that can expand and contract along the radial direction of the forming drum 50, and the finger-shaped pieces 711 are arranged at a certain angle to the axial direction of the forming drum 50. After the first tire component 201 is attached to the forming drum 50, the finger-shaped pieces 711 move to contact the end of the first tire component 201, and the finger-shaped pieces 711 and the first tire component 201 are also arranged at an angle. Then, the finger-shaped pieces 711 contract along the radial direction of the forming drum 50 until they contact the middle drum support 521, driving the end of the first tire component 201 in contact with the finger-shaped pieces 711 to contract. This facilitates the tire bead 300, whose inner diameter is smaller than the outer diameter of the first tire component 201, to pass through the first tire component 201 and move to a designated position.

[0054] like Figures 20 to 21 As shown, the rolling device 80 described in the present invention includes a first pressing roller 81 and a second pressing roller 82. The first pressing roller 81 is used to roll the middle position of the sidewall 203 after the sidewall 203 and the second component 202 of the carcass are bonded, or to roll the tread component 100 after the carcass component 200 and the tread component 100 are bonded; the second pressing roller 82 is used to completely bond and cover the end of the sidewall 203 to the end of the second component 202 of the carcass.

[0055] like Figure 2 As shown, as the second embodiment of the tire forming machine described in the present invention, the forming drum device 5 can be set to two groups, and the two groups of forming drum devices 5 are rotatably set through a rotating base (not shown), including a first forming drum device 5A and a second forming drum device 5B, and the forming drum device has a first bonding position TW1 and a second bonding position TW2. When the first forming drum device 5A performs bonding of the first tire body component 201, reverse packaging to form the second tire body component 202, and then bonding of the sidewall 203 at the first bonding position TW1, the second forming drum device 5B performs sidewall 203 pressing, tread assembly 100, inflating the tire body component 200 and bonding it with the tread component 100, and tread pressing and tire removal at the second bonding position TW2. When the first forming drum device 5A rotates to the second bonding position TW2 for operation, the second forming drum device 5B rotates to the first bonding position TW1 for operation. By providing two sets of forming drum devices 5, the forming efficiency of green tires can be improved, and the production efficiency can be improved, thereby meeting the production capacity requirements.

[0056] The present invention also provides a tire molding method, wherein a tread supply rack 20 provides various tread components to a belt drum 11 to form a tread assembly 100, and a carcass supply rack 60 provides various carcass components to a molding drum 50 having two middle drums and two side drums; the molding drum 50 can be converted into an axial first extension state, an axial second extension state and an axial third extension state according to process requirements, the middle drum can be moved to a middle drum radial first extension position MW2 according to process requirements, and the side drum can be converted into a side drum radial contraction position EM1, a side drum radial first extension position EM2 and a side drum radial second extension position EM3 according to process requirements; a carcass assembly 200 is formed on the molding drum 50 by a carcass forming method; the tread assembly 100 is then transferred to the outside of the carcass assembly 200 on the molding drum by a tread transfer ring 41, and in conjunction with the axial first extension state, the axial contraction state and the side drum radial second extension position EM3 of the molding drum, the tread assembly 100 and the carcass assembly 200 are composited on the molding drum by a composite molding method to form a green tire.

[0057] Specifically, the method for forming a carcass assembly according to the present invention comprises the following steps S1 to S4: S1: Figure 6 and 19 As shown in a, the second mobile driving source 558 drives the first middle drum 52A and the second middle drum 52B to separate from each other so that the length of the supporting surface formed by the two middle drums is L2, and the first mobile driving source 553 drives the first side drum 53A and the second side drum 53B to approach each other, so that the capsule 531 of the first side drum 53A contacts the first middle drum support 521A of the first middle drum 52A, and the capsule 531 of the second side drum contacts the second middle drum support 521B of the second middle drum to realize the first axial extension state of the forming drum 50; and the two The middle drum 52 is in the first radial stretch position MW2 of the middle drum and the two side drums 53 are in the first radial stretch position EW2 of the side drums. At this time, the first middle drum 52A, the second middle drum 52B and the first side drum 53A and the second side drum 53B are on the same circumferential surface, which are used to receive the carcass components except the sidewalls 203 provided by the carcass supply rack 60, and drive the main shaft 51 to rotate through the first rotary drive source 54, thereby driving the middle drum 52 and the side drum 53 to rotate at the same time, so as to realize the bonding of the carcass components except the sidewalls 203 to form the first carcass component 201.

[0058] S2: Figure 7 and 19b, the two side drums 53 are then retracted to the side drum radial retraction position EW1 through their respective side drum radial driving mechanisms 538, and the middle drum is still in the middle drum radial first extension position MW2, at which time the diameter D2 of the middle drum 52 is larger than the diameter D1 of the side drum 53, and the side drum 53 no longer supports the two ends of the first carcass component 201; the bead 300 is driven to move through the two ends of the first carcass component 201 through the buckle ring devices 72 located at both ends of the forming drum 50, so that the two bead 300 are respectively contacted and fixed with the first carcass component 201; Fig.19 c and 20e, the capsules 531 on the first side drum 53A and the second side drum 53B are then inflated simultaneously, so that the capsules 531 expand and move toward the direction of the middle drum 52, and the capsule booster device 73 applies a force to the capsule 531 in the direction close to the middle drum 52, driving the two end portions of the first tire body component 201 to respectively wrap around the two tire rings 300 to form the second tire body component 202.

[0059] S3: Fig. 20 As shown in FIG. 5 , the first moving driving source drives the two side drums to move relatively away from each other, so that the distance between the two side drums and the two middle drums is L5, and the turned-up ends of the carcass second assembly 202 of the side drum and the middle drum are adjacent to each other in the axial direction, forming the third axial extension state of the forming drum 50; Figure 7 As shown, the side drum radial driving mechanism 538 then drives the plurality of bladder supporting components 532 to extend synchronously, so that the side drum 53 reaches the second radial extension position EW3 of the side drum, and the middle drum 52 is radially at the first radial extension position MW2 of the middle drum, that is, at this time, the diameter D3 of the side drum 53 is greater than the diameter D2 of the middle drum 52, and the surface of the side drum 53 is substantially flush with the surface of the second carcass component 202 attached to the middle drum 52; Fig. 20 As shown in FIG. 6 , the tire body supply rack 60 provides the sidewall 203 to the forming drum 50 , and the main shaft 51 is driven to rotate by the first rotary drive source 54 , thereby driving the middle drum 52 and the side drum 53 to rotate simultaneously, thereby achieving the bonding of the sidewall 203 .

[0060] S4: Fig.10 and 20 As shown in h, the first mobile driving source 553 then drives the two side drums 53 adjacent to and in contact with the middle drum 52 to move relatively away from each other, so that the two side drums 53 are no longer in contact with the middle drum 52, and the forming drum 50 is in the second axial extension state, and the tire body second component 202 and the sidewall 203 on the middle drum 52 are pressed together by the rolling device 80, and the second pressing roller 82 in the rolling device 80 extends into the space between the middle drum 52 and the side drum 53 near the edge of the middle drum 52, and rolls the two end portions of the sidewall 203, so that the two end portions of the sidewall 203 are completely fitted with the two end portions of the tire body second component 202 to form a tire body component 200.

[0061] Before step S1, the following step S11 may also be included: Figure 5 As shown, the middle drum radial driving mechanism 527 drives the middle drum 52 to be located at the middle drum radial contraction position MW1, the side drum radial driving mechanism 538 drives the side drum to be located at the side drum radial contraction position EM1, the tire bead presetting device 42 transfers the two tire beads 300 to the two sets of buckling ring devices 72, and after the two sets of buckling ring devices 72 receive the two tire beads 300, they respectively move the two tire beads 300 to the two ends of the forming drum 50 for temporary storage.

[0062] Before the tire bead is placed in step S2, the following step S21 is also included: Fig.19 As shown in b and 19c, the carcass end contraction mechanism 71 located at both ends of the forming drum 50 brings the finger-shaped pieces 711 into contact with the two ends of the above-mentioned carcass first component 201, and combs the two ends of the carcass first component 201 inward, so that the two ends of the carcass first component 201 contract radially, that is, contract in the direction close to the forming drum axis X1, so that the tire bead 300 can pass through the end of the contracted carcass first component 201 to reach the specified position.

[0063] Optionally, before step S21, the following step S22 is also included: Fig.19 As shown in b, the first side drum 53A and the second side drum 53B are driven to approach each other by the first mobile driving source 553, so that the first side drum 53A is located in the first middle drum 52A, and the second side drum 53B is located in the second middle drum 52B, that is, the fourth axial extension state of the forming drum 50 is formed, so as to better realize the end of the first component 201 of the tire body to turn up the tire bead 300, thereby improving the tire molding quality.

[0064] Optionally, the following step S31 is further included between steps S2 and S3: Fig. 20 f. The end and middle positions of the second carcass component 202 are pressed by a rolling device 80, so that the components of the second carcass component 202 that will not be pressed by the bladder 531 are pressed by the rolling device 80, thereby making the turned-up ends of the second carcass component fit better.

[0065] It should be noted that in the above-mentioned production method, the carcass assembly 200 is a carcass assembly having one layer of carcass or two layers of carcass, and for some special tires, the carcass assembly has three layers of carcass. Therefore, for tires of this specification, after the second carcass assembly is bonded in step S3, the following step S32 can also be included: the third layer of carcass is provided to the forming drum 50 through the carcass feeding rack 60, and the main shaft 51 is driven to rotate through the first rotating drive source 54, driving the middle drum 52 and the side drum 53 to rotate at the same time, so as to achieve the bonding of the third layer of carcass to the second carcass assembly 202.

[0066] The composite molding method of the present invention for compositely forming a green tire by compositely composite a tread component and a carcass component comprises the following steps S5 and S6: S5: Fig.21 As shown in Figs. i and 21j, the side drum radial driving mechanism 538 drives the side drum 53 to contract to the side drum radial contraction position EW1, the first movable driving source 553 drives the two side drums 53 to be relatively close to each other and respectively contact the two middle drums 52, and the side drum radial driving mechanism 538 further drives the side drum 53 to extend toward the side drum radial second extension position EW3, and supports the end of the carcass assembly 200 through the tire bead positioning groove 324, so that the capsule 531 of the side drum is in complete contact with the end of the carcass assembly 200 (at this time, the side drum is restricted by the tire bead 300 and may not necessarily return to the side drum radial second extension position EW3, and may stop at a position lower than the side drum radial second extension position EW3), so that a nearly sealed space is formed between the middle drum 52 and the side drum 53.

[0067] S6: Fig.21 As shown in k and 21m, the tread assembly 100 that has been bonded on the belt drum 11 is then moved to the outside of the circumference of the carcass assembly 200 on the forming drum 50 through the tread transfer ring 41, and the two middle drums 52 are driven to approach each other through the second moving drive source 558, and the first moving drive source 553 drives the two side drums 53 to approach each other to always keep the side drum 53 and the middle drum 52 in adjacent contact, thereby maintaining an approximately sealed space between the middle drum 52 and the side drum 53, that is, the forming drum 50 forms an axially contracted state, and at the same time, the carcass assembly 200 is inflated from the position of the middle drum, and the carcass assembly 200 is expanded and shaped, so that the carcass assembly 200 is in contact and bonded with the tread assembly 100, and then the carcass assembly 200 and the tread assembly 100 are pressed together by the rolling device 80 to form a raw tire; after the raw tire is formed, the raw tire can also be unloaded through the following step S7, S7: Figure 5 As shown, the side drum 53 is then driven by the side drum radial driving mechanism 538 to shrink to the side drum radial shrinkage position EW1, and the middle drum radial driving mechanism 527 drives the middle drum 52 to shrink to the middle drum radial shrinkage position MW1, the raw tire is unloaded, and the next tire is produced.

[0068] The present invention mainly provides a new tire building machine, which makes the diameter of the building drum 50 larger than the inner diameter of the tire bead 300 to fit the first tire body component 201, and the two ends of the first tire body component 201 are radially contracted by the tire body end contraction mechanism 71, so that the tire bead 300 passes through the two ends of the first tire body component 201 and is placed at the designated position of the first tire body component 201, and the end of the first tire body component 201 located on the capsule 531 is reversed by inflating the bladder 531. The tire bead 300 is covered to form the second component 202 of the tire body, and then the sidewall 203 is bonded. The end of the sidewall 203 is completely bonded to the end of the second component 202 of the tire body to form the tire body component 200 in cooperation with the rolling device 80. The tire body component 200 is then inflated to make the tire body component 200 and the tread component 100 bonded to carry out the tire one-step molding production. Tires with any crown height can be produced, and the tires produced have a larger cord density and higher strength than those produced by the traditional one-step method. The forming drum 50 is slidingly arranged on the main shaft 51 through the first middle drum 52A and the second middle drum 52B, and the first side drum 53A and the second side drum 53B are respectively arranged on the axial outside of the first middle drum 52A and the second middle drum 52B. The two middle drums 52 and the two side drums 53 can be approached and separated from each other in the axial direction, respectively, to realize the axial contraction state, the axial first extension state, the axial second extension state, and the axial third extension state of the forming drum 50; through the middle drum radial driving mechanism 527, the middle drum 52 can be extended and retracted between the middle drum radial contraction position MW1 and the middle drum first extension position MW2; through the side drum radial driving mechanism 538, the side drum 53 can be extended and retracted between the side drum radial contraction position EW1, the side drum radial first extension position EW2 and the side drum radial second extension position EW3. Through the movement and extension and retraction coordination of the middle drum 52 and the side drum 53 between the above-mentioned positions and states, the above-mentioned one-step forming production of the raw tire is realized. The first driving device 55 can realize the synchronous approach or separation of the two side drums 53 and the two middle drums 52 in the axial direction, which can be suitable for the production of tires of different widths; and the first middle drum support 521A and the second middle drum support 521B that can be meshed can better support the tire body components of different widths; and by setting two groups of rotatable forming drums 50, production can be carried out simultaneously, thereby improving the product output speed on the forming drum 50; the tire forming machine described in the present invention has the advantages of a wide range of production applications and high production efficiency.

[0069] The above contents are only some implementation methods of the present application, and their purpose is to illustrate the technical concept and features of the present application. Any equivalent changes or replacement technical solutions that can be easily thought of by any person skilled in the art under the inspiration of the technical content of the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A tire building machine, characterized in that: It includes a belt drum device provided with a belt drum, a tread supply rack for conveying materials to the belt drum; a slide rail, a tread transfer ring movably arranged on the slide rail; a forming drum device, the forming drum device is provided with a rotatable forming drum, and the forming drum is provided with an inflatable capsule; a carcass supply rack for conveying materials to the forming drum, and a rolling device arranged opposite to the forming drum; it also includes a carcass presetting device for providing tire beads; two groups of carcass end contraction mechanisms movably arranged on the slide rail, two groups of buckle ring devices and two groups of capsule booster devices, and the two groups of carcass end contraction mechanisms, buckle ring devices and capsule booster devices are respectively arranged at both ends of the forming drum.

2. The tire building machine according to claim 1, characterized in that: The forming drum comprises a main shaft, a middle drum and side drums slidably arranged on the main shaft, a plurality of middle drum supports are arranged on the circumferential surface of the middle drum, the capsule is arranged on the circumference of the side drum, and the capsule can be inflated and stretched toward the middle drum; wherein the middle drum comprises a first middle drum and a second middle drum arranged adjacent to each other, and the side drum comprises a first side drum and a second side drum respectively arranged axially outward of the first middle drum and the second middle drum; a first rotating driving source capable of driving the main shaft to rotate, and a first driving device, the first driving device can drive the middle drum and the side drum to move in the axial direction of the main shaft to form an axial contraction state, an axial first extension state, an axial second extension state and an axial third extension state of the forming drum; the middle drum can be extended and retracted between a radial contraction position of the middle drum and a radial first extension position of the middle drum, and the side drum can be extended and retracted between a radial contraction position of the side drum, a radial first extension position of the side drum and a radial second extension position of the side drum.

3. The tire building machine according to claim 2, characterized in that: The first radial stretching position of the middle drum is at the same height as the first radial stretching position of the side drum, and the second radial stretching position of the side drum is higher than the first radial stretching position of the side drum.

4. The tire building machine according to claim 3, characterized in that: A plurality of capsule supporting components are evenly arranged on the circumference of the side drum, a tire bead positioning groove is arranged on one end of the capsule supporting component close to the middle drum, the capsule is arranged on the outer surface of the plurality of capsule supporting components, the end of the capsule is arranged at one end of the capsule supporting component close to the middle drum, and also includes a side drum main body, the side drum main body has an outer surface of the side drum main body, and also includes a first movable member slidably sleeved on the outer surface of the side drum main body, a plurality of side drum supporting components that can move radially along the side drum through a guide mechanism, a plurality of the side drum supporting components are evenly arranged along the circumferential direction of the side drum, the capsule supporting component is arranged outside the side drum supporting component, and also includes a movement conversion mechanism connecting the first movable member and the plurality of side drum supporting components, and a side drum radial driving mechanism that drives the first movable member to move.

5. The tire building machine according to claim 4, characterized in that: The side drum radial driving mechanism includes a secondary expansion component slidably arranged on the outer surface of the side drum main body, the secondary expansion component is fixedly arranged with the first movable member, the secondary expansion component has a first opening facing the first movable member, the first movable member has a second opening facing the secondary expansion component, the first opening of the first movable member, the second opening of the secondary expansion component and the outer surface of the side drum main body form a sealed side drum chamber, and also includes a first side drum piston dividing component fixedly arranged on the outer surface of the side drum main body, and a second side drum piston dividing component slidably arranged on the outer surface of the side drum main body, the first side drum piston dividing component and the second side drum piston dividing component divide the above-mentioned sealed side drum chamber into a first side drum chamber, a second side drum chamber and a third side drum chamber which are respectively sealed, the first side drum chamber, the second side drum chamber and the third side drum chamber are all provided with air passages connected to the air source, and also include a blocking part arranged in the second side drum chamber for blocking the movement of the second side drum piston dividing component.

6. The tire building machine according to any one of claims 1 to 5, characterized in that: The middle drum includes a middle drum body, which has an outer surface of the middle drum body; a second movable member slidably arranged on the outer surface of the middle drum body, and a middle drum end member fixedly arranged with the middle drum body, wherein the middle drum end member has a circular middle drum end surface, and the middle drum end surface is perpendicular to the outer surface of the middle drum body; it also includes a plurality of middle drum connecting members arranged radially along the middle drum, the middle drum connecting members are movably arranged on the middle drum end surface, and a plurality of the middle drum connecting members are hingedly arranged on the circumference of the second movable member, and one end of the middle drum connecting member away from the second movable member is connected to the middle drum support member; it also includes a middle drum radial driving mechanism that can drive the second movable member to move axially along the outer surface of the middle drum body.

7. The tire building machine according to claim 6, characterized in that: The middle drum radial driving mechanism includes a sleeve slidably arranged on the middle drum body, the sleeve having a sleeve body and a sleeve protrusion close to the second movable member, the sleeve protrusion can slide on the outer surface of the second movable member; the second movable member has a vertically arranged movable member body and a middle drum piston dividing portion, the sleeve protrusion, the sleeve body, the second movable member and the outer surface of the middle drum body form a middle drum first chamber and a middle drum second chamber divided by the middle drum piston dividing portion of the second movable member, the middle drum first chamber and the middle drum second chamber respectively have air holes connected to the air source.

8. The tire building machine according to any one of claims 1 to 5, characterized in that: The tire body end contraction mechanism comprises a plurality of finger-shaped pieces which can expand and contract along the radial direction of the forming drum, and the finger-shaped pieces are arranged at a certain angle to the axial direction of the forming drum.

9. A tire molding method, characterized in that: Based on the tire forming machine described in claim 1, the tread supply rack provides tread components to the belt drum to form a tread assembly, and the carcass supply rack provides carcass components to a forming drum having two middle drums and two side drums; the forming drum can be converted into an axial first extension state, an axial second extension state and an axial third extension state according to process requirements, the middle drum can be moved to a middle drum radial first extension position according to process requirements, and the side drum can be converted into a side drum radial contraction position, a side drum radial first extension position and a side drum radial second extension position according to process requirements; a carcass assembly is formed on the forming drum by a carcass forming method; the tread assembly is then transferred to the outside of the carcass assembly on the forming drum by a tread transfer ring, and in conjunction with the axial first extension state, the axial contraction state and the side drum radial second extension position of the forming drum, the tread assembly and the carcass assembly are composited on the forming drum by a composite forming method to form a raw tire.

10. The tire molding method according to claim 9, characterized in that: The carcass forming method comprises the following steps: S1: the forming drum is in the first axial extension state in the axial direction, the middle drum is in the first radial extension position in the radial direction, and the side drum is in the first radial extension position in the radial direction, and the carcass components except the sidewalls are provided by the carcass supply rack to be attached to the forming drum to form a first carcass assembly; S2: the middle drum is in the first radial extension position of the middle drum, the side drum is in the radial contraction position of the side drum, the tire bead is mounted on the first carcass component through the buckle ring device, the bladder on the side drum is inflated and turned up, so that the end of the first carcass component turns up the tire bead to form the second carcass component; S3: the forming drum is in the third axial extension state, the middle drum is in the first radial extension position, and the side drum is in the second radial extension position. The tire sidewall is provided by the tire body supply rack and attached to the forming drum for sidewall attachment. S4: The forming drum is in the second axial extension state, and the two ends of the sidewall are rolled by the rolling device so that the sidewall and the second component of the carcass are completely fitted to form a carcass component.

11. The tire molding method according to claim 9, characterized in that: The composite molding method comprises the following steps: S5: the side drum contracts to a radial contraction position of the side drum, and then the axially upper side drum moves toward the middle drum to be adjacent to the middle drum and to reach a first axial extension state of the forming drum, and the side drum further extends toward a radial second extension position of the side drum to support the end of the carcass assembly, and the bladder of the side drum is in full contact with the end of the carcass assembly, so that a nearly sealed space is formed between the middle drum and the side drum; S6: The tread transfer ring moves the tread assembly that has been bonded on the belt drum to the outside of the circumference of the carcass assembly on the forming drum. The two middle drums are axially close to each other, and the two side drums are always in adjacent contact with the two middle drums to form an axial contraction state of the forming drum. At the same time, the carcass assembly is inflated from the position of the middle drum, and the carcass assembly expands and contacts and bonds with the tread assembly; then the carcass assembly and the tread assembly are pressed together by a rolling device to form a raw tire.

12. The tire molding method according to claim 10, characterized in that: Before step S1, the following step S11 is included: the middle drum is located at the middle drum radial contraction position, the side drum is located at the side drum radial contraction position, the tire bead presetting device transfers the two tire beads to the two sets of buckling devices, and after the two sets of buckling devices receive the two tire beads, they move the two tire beads to the two ends of the forming drum respectively.

13. The tire molding method according to claim 10, characterized in that: Before the tire bead is installed in step S2, the following step S21 is also included: the two ends of the first carcass assembly are radially contracted by a carcass end contraction mechanism, so that the tire bead can pass through the ends of the contracted first carcass assembly to reach a designated position.

14. The tire molding method according to claim 13, characterized in that: Before step S21, the method further includes the following step S22: the upper side drum is axially moved closer to the middle drum, so that the side drum is located inside the middle drum, thereby forming a fourth axial extension state of the forming drum.

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