Molding drum and tire molding machine comprising same

Abstract

The invention provides a forming drum which comprises a main shaft, a middle drum and a side drum, the middle drum and the side drum are arranged on the main shaft in a sliding mode, a plurality of middle drum supporting pieces are arranged on the circumferential surface of the middle drum, a capsule capable of being inflated to extend towards the middle drum is arranged on the circumference of the side drum, and the middle drum comprises a left middle drum and a right middle drum which are arranged adjacently. The side drums comprise a first side drum and a second side drum which are respectively arranged on the axial outer sides of the left middle drum and the right middle drum; the first rotary driving source can drive the main shaft to rotate, the first driving device can drive the middle drum and the side drums to move in the axial direction of the main shaft, and an axial contraction state, an axial first stretching state, an axial second stretching state and an axial third stretching state of the forming drum are formed; the middle drum can stretch out and draw back between a middle drum radial shrinkage position and a middle drum radial first stretching position, and the side drum can stretch out and draw back among a side drum radial shrinkage position, a side drum radial first stretching position and a side drum radial second stretching position. According to the invention, the middle drum and the side drum are matched with each other in movement and stretching between the positions and states, so that tires with any tire crown height and tire width can be produced by a one-step method, and the device has the advantages of wide production application range and high production efficiency.

Description

Technical Field

[0001] The invention relates to the field of tire molding equipment, in particular to a molding drum and a tire molding machine containing the same. 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] To solve the above technical problems, the present invention provides a forming drum, comprising 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, and an inflatable capsule that can be extended toward the middle drum is arranged on the circumference of the side drum, wherein the middle drum comprises a left middle drum and a right middle drum that are adjacently arranged, and the side drum comprises a first side drum and a second side drum that are respectively arranged axially outward of the left middle drum and the right middle drum; a first rotating driving source that can drive 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.

[0004] Preferably, 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.

[0005] Preferably, 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, and the end of the capsule is arranged at one end of the capsule supporting component close to the middle drum.

[0006] Preferably, the side drum includes a side drum body, the side drum body has an outer surface of the side drum body, and also includes a first movable member slidably mounted on the outer surface of the side drum body, a plurality of side drum supporting components that can move radially along the side drum through a guide mechanism, the plurality of 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.

[0007] Preferably, the movement conversion mechanism includes a plurality of first inclined surfaces evenly arranged along the circumference of the first movable member, a plurality of side drum support components are arranged opposite to the plurality of first inclined surfaces, and also includes a second inclined surface arranged on the side drum support component opposite to the corresponding first inclined surfaces, the first inclined surface of the first movable member is parallel to the second inclined surface of the side drum support component, and also includes a first movable component respectively arranged on the first inclined surface of the first movable member and the second inclined surface of the side drum support component.

[0008] Preferably, the guide mechanism includes a side drum end component fixedly arranged at one end of the side drum body, the side drum end component has a circular inner surface, the circular inner surface of the side drum end component is perpendicular to the outer surface of the side drum body, a plurality of protrusions are arranged on the circular inner surface, and T-shaped guide grooves are formed between the protrusions, and also includes a T-shaped structure arranged at one end of the side drum support component, and the T-shaped structure is coupled with the T-shaped guide groove.

[0009] Preferably, 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.

[0010] Preferably, the capsule includes a capsule body arranged on a capsule supporting component, and the end of the capsule body is fixedly arranged on one end of the capsule supporting component close to the middle drum; it also includes a capsule side end vertically connected to the capsule body, and the capsule side end is fixedly arranged on the end of the side drum close to the middle drum away from the end connected to the capsule body.

[0011] Preferably, the capsule further comprises a connecting portion connected to the capsule body near one end of the middle drum, the connecting portion and the capsule body are in the same horizontal plane, and the position where the connecting portion contacts the end of the middle drum is contoured with the end of the middle drum.

[0012] Preferably, 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 face, and the middle drum end face 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 face, the plurality of middle drum connecting members are hingedly arranged on the circumference of the second movable member, and the middle drum connecting member is connected to the middle drum support member at one end away from the second movable 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.

[0013] Preferably, 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, and 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, and the middle drum first chamber and the middle drum second chamber respectively have air holes connected to the air source.

[0014] Preferably, the left center drum has a plurality of left center drum supporting members, and the right center drum has a plurality of right center drum supporting members, and the left center drum supporting members and the right center drum supporting members can be arranged in meshing relationship.

[0015] Preferably, it also includes a main shaft seat, the main shaft is rotatably arranged in the main shaft seat, the first rotation driving source is fixedly arranged on the main shaft seat, and the driving end of the first rotation driving source is connected to the main shaft through a first transmission device; the first driving device includes an inner shaft sleeved in the main shaft, and a first inner sleeve sleeved outside the inner shaft, the inner shaft is fixedly connected to the second side drum, the first inner sleeve is fixedly connected to the first side drum, and also includes a first movable driving source that can simultaneously drive the inner shaft and the first inner sleeve to move axially toward or in the opposite direction along the forming drum, the first movable driving source is fixedly arranged on the main shaft seat, and the first movable driving source is fixedly arranged on the main shaft seat. The driving end of the source is connected to the inner shaft and the first inner sleeve respectively through the second transmission device; it also includes a second inner sleeve and a third inner sleeve which are sleeved between the inner shaft and the first inner sleeve, wherein the third inner sleeve is sleeved outside the second inner sleeve, the second inner sleeve is fixedly connected to the right middle drum, and the third inner sleeve is fixedly connected to the left middle drum, and also includes a second movable driving source which can simultaneously drive the second inner sleeve and the third inner sleeve to move axially toward or in the opposite direction along the forming drum, the second movable driving source is fixedly arranged on the main shaft seat, and the driving end of the second movable driving source is connected to the second inner sleeve and the third inner sleeve respectively through the third transmission device.

[0016] The present invention also provides a molding machine, wherein the molding machine has the above-mentioned molding drum.

[0017] The present invention mainly provides a new forming drum, which is slidingly arranged on a main shaft through a left middle drum and a right middle drum, and a first side drum and a second side drum respectively arranged on the axial outer sides of the left middle drum and the right middle drum. The two middle drums and the two side drums can be respectively approached and separated from each other in the axial direction to realize the axial contraction state, the axial first extension state and the axial second extension state of the forming drum; through the radial driving mechanism of the middle drum, the middle drum can be extended and retracted between a radial contraction position and a radial first extension position; through the radial driving mechanism of the side drum, the side drum can be extended and retracted between a radial contraction position, a radial first extension position and a radial second extension position. Through the movement and extension and retraction coordination between the middle drum and the side drum in the above positions and states, it is realized that first the carcass components are bonded to form a first carcass component, then the first carcass component is reversed to form a second carcass component, then the sidewalls are bonded to form a carcass component, and then the carcass component is inflated to bond the carcass component with the tread component to form a one-step forming production of a raw tire. The first driving device can realize the synchronous approach or separation of the side drum and the middle drum in the axial direction, which can be suitable for the production of tires of different widths; and the left middle drum support and the right middle drum support that can be arranged in an engageable manner can better support the tire body components of different widths; the above-mentioned production method can be used to form tires of any crown height and tire width in one step, which has the advantages of wide production application range and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the forming drum described in the present invention.

[0019] Figure 2 It is a main schematic diagram of the forming drum described in the present invention.

[0020] Figure 3 for Figure 2 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.

[0021] Figure 4 for Figure 2 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.

[0022] Figure 5 for Figure 2 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.

[0023] Figure 6 Bit Figure 2 The 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.

[0024] Figure 7 for Figure 2 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.

[0025] Figure 8 for Figure 2 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.

[0026] Fig. 9 It is a schematic diagram of the side drum main body described in the present invention.

[0027] Fig.10 for Fig. 9 A half-section view along BB', wherein the side drum is in a radially contracted position.

[0028] Fig.11 for Fig. 9 A half-section view along BB', wherein the side drum is located in the first radially extended position of the side drum.

[0029] Fig.12 for Fig. 9A half-section view along line BB', wherein the side drum is located at the second radially extended position of the side drum.

[0030] Fig.13 It is a schematic diagram of the left middle drum of the present invention.

[0031] Fig.14 It is a schematic diagram of the right middle drum described in the present invention.

[0032] Fig.15 for Fig.13 A half-section view along CC', wherein the middle drum is in a radially contracted position.

[0033] Fig.16 for Fig.13 A half-section view along CC', wherein the middle drum is located at the first radially extended position of the middle drum.

[0034] Fig.17 Figures a to d are the working principle diagrams of the forming drum described in the present invention.

[0035] Fig.18 Figure e is the working principle diagram of the forming drum described in the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0037] like Figures 1 to 18As shown, the present invention discloses a forming drum 1, which is used for one-step forming production of green tires, and can be applicable to the production of tires with different crown requirements such as standard crown, high crown and low crown, and is not affected by the crown height of the tire. The forming drum 1 comprises a main shaft 10, a middle drum 20 and a side drum 30 slidably arranged on the main shaft 10, wherein the middle drum 20 comprises a left middle drum 20A and a right middle drum 20B arranged adjacent to each other, and the side drum 30 comprises a first side drum 30A and a second side drum 30B respectively arranged on the outer sides of the left middle drum 20A and the right middle drum 20B in the axial direction (the first side drum 30A and the second side drum 30B have the same structure, and the reference numerals AB are used to distinguish the left and the right), that is, the left middle drum 20A and the right middle drum 20B are arranged between the first side drum 30A and the second side drum 30B; a plurality of middle drum support members 21 are evenly arranged on the circumferential surface of the middle drum 20, a plurality of capsule support components 31 are arranged on the circumference of the side drum 30, and the plurality of capsule support components 31 are evenly arranged along the circumference of the side drum 30. The outer surface of the forming drum is an arc surface, and a bead positioning groove 314 is provided on the end of the capsule supporting component 31 close to the middle drum 20. The bead positioning groove 314 is used to position the bead 200. The outer surfaces of the several capsule supporting components 31 are provided with capsules 32. The outer surfaces of the several capsule supporting components 31 form an approximately complete circumferential surface. The capsules 32 are arranged outside the circumferential surface. The end of the capsule 32 is arranged on the capsule supporting component 31 close to the middle drum 20. When the capsule 32 is inflated, the capsule 32 expands toward the middle drum 20. The forming drum also includes a first rotating drive source 40 that can drive the main shaft 10 to rotate. The main shaft 10 is driven to rotate by the first rotating drive source 40, thereby driving the middle drum 20 and the side drum 30 to rotate synchronously to fit the various components of the tire body. The forming drum further comprises a first driving device 50, which can drive the middle drum 20 and the side drum 30 to move in the axial direction of the main shaft 10, so that the left middle drum 20A and the right middle drum 20B can move closer to and away from each other to form an axial contraction state and an axial first extension state of the forming drum (the axial contraction state of the forming drum is as follows: Figure 3 As shown, the length of the support surface formed by the left middle drum 20A and the right middle drum 20B close to each other is L1; the first axial extension state of the forming drum is Figure 4 , 5 As shown in FIG. 7 , the length of the support surface formed by the separation of the left center drum 20A and the right center drum 20B is L2), and the first side drum 30A and the second side drum 30B can be close to and separated from the left center drum 20A and the right center drum 20B. When the first side drum 30A and the second side drum 30B are separated from the left center drum 20A and the right center drum 20B 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. 7 ). Figure 8As shown, the length of the support surface formed by the left middle drum 20A and the right middle drum 20B is L2, and the spacing between the first side drum 30A and the left middle drum 20A, and the spacing between the second side drum 30B and the right middle drum 20B is L3; the third axial extension state of the forming drum is that the length of the support surface formed by the left middle drum 20A and the right middle drum 20B is L2, and the spacing between the first side drum 30A and the left middle drum 20A, and the spacing between the second side drum 30B and the right middle drum 20B is L5, and the spacing L5 is the distance between the corresponding turn-up ends of the second component of the carcass); the middle drum 20 can be extended and retracted along the radial direction of the main axis, so that the middle drum support 21 on the surface of the middle drum 20 is respectively located at the middle drum radial contraction position MW1 and the middle drum radial first extension position MW2, and the side drum 30 can be extended and retracted along the radial direction of the main axis, so that the capsule 32 arranged 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 stretch position MW2 of the middle drum and the first radial stretch 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 set at the same level or at different levels according to process requirements, and the second radial stretch position EW3 of the side drum is higher than the first radial stretch position EW2 of the side drum. The first radial stretch position MW2 of the middle drum and the first radial stretch position EM2 of the side drum are higher than the inner diameter of the tire bead, and the radial contraction position MW1 of the middle drum and the radial contraction position EW1 of the side drum are lower than the inner diameter of the tire bead. The drawings and the following embodiments are only described by taking the radial contraction position MW1 of the middle drum and the radial contraction position EW1 of the side drum as the same level as an example.

[0038] like Figure 3 As shown, when the forming drum is in an axially contracted state, it is used to inflate and shape the carcass assembly attached to the surface of the middle drum 20 and the side drum 30; Figure 4 As shown, when the forming drum is in the first axially extended state, it is used to bond various carcass components except the sidewall 103 on the surface of the middle drum 20 and the side drum 30 to form a first carcass assembly 101 (the first carcass assembly refers to the component formed after various carcass components except the sidewall 103 are bonded to the forming drum); as shown in FIG. Figure 8 and 18 As shown, when the forming drum is in the second axial extension state, the rolling device 300 can extend into the edge of the middle drum 20 near the side drum 30 to press the end of the sidewall 103 attached to the second carcass component 102 (the second carcass component refers to the end of the first carcass component 101 turned up, and the tire bead 200 is covered to form the carcass component 100; when the forming drum is in the third axial extension state, the side drum 30 is adjacent to the end of the second carcass component 102 on the middle drum 20 that has completed the end turn-up, so as to facilitate the attachment of the sidewall 103. Figure 3As shown, when the side drum 30 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 32 of the side drum and the middle drum support 21 of the middle drum are at the same height position of the same diameter D1, or at different diameter height positions (not shown), which are used to unload the green tire after production; Figure 4 and 17 As shown in a, when the side drum 30 is located at the first radial stretch position EW2 of the side drum, and the middle drum 20 is located at the first radial stretch position MW2 of the middle drum, that is, the bladder 32 of the side drum and the middle drum support 21 of the middle drum are at the same diameter height D2, and the height is higher than the inner diameter height of the tire bead, which is used to bond the carcass components except the sidewall 103 to form the first carcass assembly 101, and the carcass components except the sidewall 103 are bonded to the surfaces of the middle drum 20 and the side drum 30, that is, bonded to the middle drum support 21 of the middle drum and the bladder 32 of the side drum; as shown in FIG. Figure 5 and 17 As shown in Figs. 17b and 17c, when the middle drum 20 is located at the first radial extension position MW2 of the middle drum and the side drum 30 is located at the radial contraction position EW1 of the side drum, that is, the diameter D1 of the side drum 30 is smaller than the diameter D2 of the middle drum 20, the tire bead 200 is placed on the tire bead 200, and the bladder 32 of the side drum is inflated so that the first tire body component 101 is turned upside down to wrap the tire bead 200 to form the second tire body component 102; Figure 7 and 17 As shown in d, when the middle drum 20 is located at the first radial stretch position MW2 of the middle drum and the side drum 30 is located at the second radial stretch position EW3 of the side drum, the capsule 32 of the side drum and the highest point of the upper surface of the second component 102 of the carcass located on the middle drum are at the same height position of the diameter D3, that is, the capsule 32 and the highest point of the upper surface of the second component 102 of the carcass are at the same height or on a plane approximately at the same height, which are used to fit the sidewall 103, so that the sidewall 103 is fitted on the capsule 32 and the second component 102 of the carcass at the same height or approximately at the same height.

[0039] It should be noted that the tire described in the present invention can be a tire with only one layer of carcass, or a tire with two layers of carcass, or a tire with three layers of carcass. When it has a one-layer carcass or a two-layer carcass, the first carcass component refers to the carcass parts excluding the sidewalls; when it has a three-layer carcass, the first carcass component refers to the carcass parts excluding the sidewalls and the third layer of carcass, and the third layer of carcass needs to be bonded before the sidewalls are bonded to the second carcass component.

[0040] The present invention realizes the following by the overall axial extension or contraction of the forming drum 1 (including the middle drum 20 and the side drum 30), the coordination of the positions and states among the middle drum radial contraction position MW1, the middle drum radial first extension position MW2, the side drum radial contraction position EW1, the side drum radial first extension position EW2 and the side drum radial second extension position EW3. Fig.17As shown in a, firstly, the carcass components except the sidewall 103 are attached to the forming drum to form the carcass first assembly 101, as shown in FIG. Fig.17 As shown in FIG. 2, the tire bead 200 is passed through the side drum and placed on the first tire body component 101, as shown in FIG. Fig.17 As shown in c, the bladder 32 on the opposite drum 30 is inflated to realize that the two ends of the first tire component 101 are respectively turned up to wrap the two tire beads 200 to form the second tire component 102, as shown in FIG. Fig.17 As shown in d, the sidewall 103 is then flatly attached to the surface of the second carcass component 102 to form the carcass component 100; the tread component that has been attached on the belt drum is moved to the outside of the circumference of the carcass component 100 on the forming drum, and the carcass component 100 is inflated and shaped so that the carcass component 100 is completely attached to the tread component to form a green tire, thereby realizing the one-step forming of the green tire. Through the above-mentioned production method of first wrapping the tire bead 200 of the carcass first component 101 on the forming drum to form the second carcass component 102, then attaching the sidewall 103 to form the carcass component 100, and then inflating the carcass component 100 to attach it to the tread component, the forming of green tires of any crown height can be achieved, and the entire forming is completed on one forming drum, without the need to repeatedly replace the bonding drum, which can reduce ineffective operations and improve production efficiency and manufacturing accuracy. In a conventional one-step forming machine, the surface of the forming drum is lower than the inner diameter of the tire bead for fitting the tire body components. In the one-step forming machine provided by the present invention, the surface of the forming drum is higher than the inner diameter of the tire bead for fitting during the process of fitting the tire body components to form the first tire body assembly. Therefore, when producing tires of the same specification, the circumferential surface of the forming machine provided by the present invention can fit tire body components of a larger length, so there are more tire cords in the tire body components, the cord density is also greater, the degree of expansion of the tire after forming is small, and the strength of the tire is higher.

[0041] like Figures 9 to 12As shown, the side drum 30 of the present invention includes a ring-shaped side drum body 33, the side drum body 33 has a side drum body outer surface 331, and also includes a first moving member 34 slidably sleeved on the side drum body outer surface 331, the first moving member 34 can move axially along the side drum body outer surface 331, and also includes a plurality of side drum supporting components 36 that can move radially along the side drum body 33 through a guide mechanism 35, the plurality of side drum supporting components 36 are evenly arranged along the circumferential direction of the side drum, the capsule supporting component 31 is arranged outside the side drum supporting component 36, and also includes a first moving member 34 connected to the side drum body outer surface 331. 34 and a movement conversion mechanism 37 of several side drum supporting parts 36, and a side drum radial driving mechanism 38 for driving the first moving member 34 to move. When the side drum radial driving mechanism 38 drives the first moving member 34 to move in the axial direction of the side drum main body 33, the side drum supporting parts 36 are moved relative to the side drum main body 33 in the radial direction of the side drum through the movement conversion mechanism 37, so as to realize the radial extension and retraction of the side drum, and the side drum radial driving mechanism 38 is used to realize the extension and retraction of the side drum 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 respectively.

[0042] Preferably, the movement conversion mechanism 37 includes a plurality of first inclined surfaces 341 evenly arranged along the circumference of the first movable member 34, a plurality of side drum support components 36 are arranged opposite to the plurality of first inclined surfaces 341, and also includes a second inclined surface 361 arranged on the side drum support component 36 opposite to the corresponding first inclined surface 341, the first inclined surface 341 of the first movable member is parallel to the second inclined surface 361 of the side drum support component, that is, the angle formed by the first inclined surface 341 and the horizontal direction is the same as the angle formed by the second inclined surface 361 of the side drum support component and the horizontal direction, and also includes a first movable component 373 respectively arranged on the first inclined surface 341 and the second inclined surface 361 of the side drum support component, the first movable 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 38 drives the first movable member 34 to move axially along the outer surface 331 of the side drum body, it drives a plurality of first sliders 3732 respectively arranged on a plurality of first inclined surfaces 341 of the first movable member to move simultaneously, that is, the first slider 3732 moves on the first slide rail 3731 arranged on the second inclined surface, thereby driving a plurality of side drum supporting components 36 to move simultaneously along the radial direction of the side drum.

[0043] The guide mechanism 35 includes a side drum end component 351 fixedly arranged at one end of the side drum body 33, 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 perpendicularly arranged 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 36, the T-shaped structure 354 is coupled with the T-shaped guide groove 353, and the side drum support component 36 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 36 can only move along the radial direction of the side drum through the above-mentioned guide mechanism 35. The side drum end component 351 and the side drum body 33 can be arranged in one piece or separately.

[0044] Preferably, the side drum radial driving mechanism 38 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 34, the secondary expansion component 381 has a first opening 3811 facing the first movable member 34, the first movable member 34 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 84 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, wherein 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), wherein the end of the first movable member 34 protrudes from the secondary expansion component 381 in the side drum chamber to form a blocking portion 388, and 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 34, 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 34 protruding the secondary expansion component 381 in the side drum chamber. Of course, the blocking portion 388 independently arranged on the first moving member 34 or the secondary expansion component 381 can also be formed to block the movement of the second side drum piston segmentation component 384.

[0045] It should be noted that when the tire carcass components described in the present invention are attached to the forming drum, they are completely attached to the middle drum support 21 of the middle drum, and attached to one end of the side drum 30 close to the middle drum 20. If the side drum 30 is in the state of being extended in the first radial extension position EW2 and the second radial extension 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 30 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. 9As shown, preferably, the capsule support member 31 of the present invention has a first support side portion 311 and a second support side portion 312, the first support side portion 311 and the second support side portion 312 are continuous tooth-shaped or wave-shaped, and the first support side portion 311 and the second support side portion 312 can be coupled. When the side drum 30 is in the radial contraction position EW1 of the side drum, the second support side portions 312 and the first support side portions 311 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 wave-shaped or tooth-shaped second support side portions 312 and the first support side portions 311, when the side drum 30 is in the second radial extension position EW3 of the side drum, although there is a gap between the two adjacent capsule support members 31, the two adjacent meshing capsule support members 31 make the circumferential surface of the side drum 30 have the least discontinuous part in the axial direction, so that when the carcass components are attached, the carcass components can be supported to the greatest extent.

[0046] When the forming drum of the present invention is used to inflate the carcass assembly, it is necessary to ensure that both ends of the middle drum are sealed. Figures 10 to 12 As shown, preferably, the capsule 32 of the side drum of the present invention includes a capsule body 321 arranged on the capsule support component, the end of the capsule body is fixedly arranged on the end of the capsule support component close to the middle drum, the capsule body can be inflated and expanded in the direction of the middle drum, and the capsule side end 322 vertically connected to the capsule body 321, the capsule side end 322 is fixedly arranged on the end of the side drum 30 close to the middle drum 20 away from the end connected to the capsule body, and is specifically fixedly arranged on the side drum end component 351 of the side drum, and the side drum is sealed near the middle drum by the capsule side end and the side drum end component. When the forming drum is in an axially contracted state to inflate and shape the carcass assembly 100 located on the surface of the middle drum, the capsule side end 322 is located between the middle drum 20 and the side drum 30, so that an approximately sealed space is formed between the two middle drums and the capsule side end 322, the side drum end component 351 and the main shaft 10, so that the gas will not leak from the side drum or between the side drum and the middle drum, and the carcass assembly 100 can be better inflated.

[0047] Due to the process of the tire bead being turned up at the end of the first tire component 101, part of the first tire component 101 needs to be close to the end of the middle drum 20, that is, the end of the middle drum support 21. Therefore, in order to realize the turning up of the first tire component 101 and prevent the first tire component 101 from being punctured during the turning up process, the end of the middle drum 20 needs to be set in an arc shape. Therefore, when the side drum 30 and the middle drum 20 are set adjacent to each other for bonding the various tire components, the bladder 32 of the side drum and the middle drum support 21 of the middle drum are not completely connected, because there is a concave part due to the arc setting of the end of the middle drum. When the tire components are bonded on the middle drum 20 and the side drum 30, 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 32 described in the present invention also includes a connecting portion 323 connected to the capsule body 321 and close to one end of the middle drum 20. The connecting portion 323 is on the same horizontal plane as the capsule body 321 and is arranged in a shape similar to the end of the middle drum at a position in contact with the middle drum 20, that is, it is arranged in an arc shape. When the forming drum 20 is in the first axial extension state, the connecting portion 323 is completely connected to the middle drum support 21 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 is in the first axial extension state and the carcass parts are being bonded, the continuous plane formed by the connecting portion 323 of the capsule and the middle drum support 21 can better support the bonding of the carcass parts.

[0048] The working principle of the side drum radial driving mechanism 38 driving the side drum 30 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.10 As shown, when the side drum 30 is in the side drum radial contraction position EW1, the first moving member 34 is close to the first side drum piston partition member 383, that is, the first side drum chamber 385 reaches the minimum; Fig.11As shown, when the side drum 30 is to reach the first radial extension position EW2 of the side drum, gas is firstly 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 the maximum; then gas is filled into the first side drum chamber 385, so that the secondary expansion component 381, the first moving member 34 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 the minimum at this time; due to the side The drum supporting component 36 can only move radially along the side drum 30 through the guide mechanism 35. When the first moving member 34 moves toward the side drum supporting component 36, the inclined first sliding block 3732 moves on the first sliding rail 3731 in a direction relatively close to the side drum supporting component 36, thereby driving the side drum supporting component 36 to move along the radial direction of the side drum toward a direction away from the side drum axis X2, and driving the capsule supporting component 31 and the capsule 32 arranged on the side drum supporting component 36 to move synchronously along the radial direction of the side drum toward a direction away from the side drum axis X2, so that the side drum 30 reaches the first radial extension position EW2 of the side drum; Fig.12 As shown, when the side drum 30 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 34 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 partition 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 34 is further In the process of moving on the outer surface 331 of the side drum body toward the side drum supporting component 36, the inclined first slider 3732 moves further on the first slide rail 3731 toward the direction close to the side drum supporting component 36, thereby driving the side drum supporting component 36 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 31 and capsule 32 arranged on the side drum supporting component 36 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 30 reaches the second radial extension position EW3 of the side drum.

[0049] Furthermore, if Fig. 9As shown, the capsule support component 31 of the present invention is provided with a reset groove 313 along the circumferential direction of the side drum, and the reset grooves 313 on the capsule support components form an approximately annular groove, and also include an annular first elastic reset element 39, which is arranged in the annular groove. When the side drum 30 is in the side drum radial contraction position EW1, the first elastic reset element 39 is in a natural state, and when the side drum 30 is in the side drum radial first extension position EW2 and the side drum radial second extension position EW3, the first elastic reset element 39 is in an extension state, and has an elastic restoring force on the capsule support component 31 toward the side drum axis X2. When the side drum 30 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 39 is used to help the side drum 30 return to the side drum radial first extension position EW2 and the side drum radial contraction position EW1. Preferably, the first elastic reset element 39 is an annular spring.

[0050] like Fig.11 and 12 As shown, the process of the side drum 30 returning from the second radial extension position EW3 of the side drum to the first radial extension position EW2 of the side drum is as follows: first, the third side drum chamber 387 is filled with gas, and part of the gas in the first side drum chamber 385 is extracted, so that the second side drum piston partition component 384 contacts the first side drum piston partition component 383, that is, the second side drum chamber 386 is the smallest, and the third side drum chamber 387 is the largest, so that the first moving member 34 and the secondary expansion member 381 move in the direction away from the side drum end member 351, driving the first slider 3732 to move on the first slide rail 3731 in the direction away from the side drum end member 351, and the elastic restoring force of the first elastic reset element 39 causes the side drum support member 36 to move along the side drum end member 351 in the direction close to the side drum axis X2, driving the capsule support member 31 and the capsule 32 to shrink, so that the side drum 30 returns to the first radial extension position EW2 of the side drum; as shown Fig.10As shown, when the side drum 30 needs to return from the first radial extension position EW2 of the side drum to the radial contraction position EW1 of the side drum, the gas in the first side drum chamber 385 is further extracted, and the first movable member 34, the secondary expansion member 381 and the second side drum piston dividing member 384 move in the direction away from the side drum end member 351 until the first movable member 34 is completely in contact with the first side drum piston dividing member 383, that is, the first side drum chamber 385 reaches a minimum, driving the first slider 3732 to move on the first slide rail 3731 in the direction away from the side drum end member 351, and the elastic restoring force of the first elastic reset element 39 causes the side drum support member 36 to further move along the side drum end member 351 in the direction close to the side drum axis X2, driving the capsule support member 31 and the capsule 32 to further contract, so that the side drum 30 returns to the side drum radial contraction position EW1. Of course, the process of the side drum 30 returning from the side drum radial first extended position EW2 to the side drum radial contracted position EW1 can also be carried out while the first side drum chamber 385 is evacuated and the second side drum chamber 386 is filled with gas, so as to speed up the return of the side drum 30 from the side drum radial first extended position EW2 to the side drum radial contracted position EW1 and improve work efficiency.

[0051] The left middle drum support member 21A and the right middle drum support member 21B of the present invention can be completely identical (e.g., both are tooth-shaped parts), or different, as long as the left middle drum support member 21A and the right middle drum support member 21B can be meshed and arranged. However, the structures of the left middle drum 20A and the right middle drum 20B are completely identical, so they can be collectively referred to as middle drums. When the structures of the left middle drum support member 21A and the right middle drum support member 21B are different, such as Figures 13 to 16As shown, the middle drum 20 of the present invention includes a middle drum body 22, the middle drum body 22 has a middle drum body outer surface 221, a second moving member 23 slidably arranged on the middle drum body outer surface 221, and also includes a middle drum end component 24 fixedly arranged with the middle drum body 22, the middle drum end component 24 has a circular middle drum end surface 241, and 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 25 uniformly arranged along the radial direction of the middle drum, and the middle drum connecting member 25 is connected to the middle drum by 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 25, and the second slider 262 is fixedly arranged on the middle drum end component 24). A middle drum end surface 241 of the middle drum end component is movably arranged, and the plurality of middle drum connecting members 25 are hingedly arranged on the circumference of the second movable member 23. The end of the middle drum connecting member 25 away from the second movable member 23 is connected to the middle drum supporting member 21, and also includes a middle drum radial driving mechanism 27 that can drive the second movable member 23 to move along the outer surface 221 of the middle drum body, thereby driving the plurality of middle drum connecting members 25 to synchronously approach the middle drum body 22 or move away from the middle drum body 22, so as to drive the plurality of middle drum supporting members 21 connected to the middle drum body 22 to synchronously move in the direction of approaching the middle drum body 22 or moving away from the middle drum body 22, thereby realizing the extension and retraction of the middle drum 20 between the middle drum radial contraction position MW1 and the middle drum radial first extension position MW2.

[0052] Preferably, the middle drum connecting member 25 is hingedly connected to the second movable member 23 through a connecting rod 28, one end of the connecting rod 28 is hingedly arranged on the circumference of the second movable member 23, and the other end of the connecting rod 28 is hingedly arranged at the middle position of the middle drum connecting member 25. The position on the middle drum body 22 close to the connection with the middle drum end component 24, the middle drum end surface 241 and the second movable member 23 form an accommodating space 29 for accommodating the middle drum connecting member 25. When the second movable member 23 moves on the middle drum body 22, the connecting rod 28 drives several middle drum connecting members 25 to move on the middle drum end surface 241 in the accommodating space 29, thereby realizing the conversion of the movement of the second movable member 23 in the axial direction of the middle drum into the movement of the middle drum connecting member 25 in the radial direction of the middle drum.

[0053] The middle drum radial driving mechanism 27 described in the present invention includes a sleeve 271 slidably arranged on the middle drum main body 22, the sleeve 271 having a sleeve body 2711 and a sleeve protrusion 2712 close to the second movable member 23, the sleeve protrusion 2712 can slide on the outer surface of the second movable member 23; the second movable member 23 has a vertically arranged movable member body 231 and a middle drum piston dividing portion 232, the sleeve protrusion 2712, the sleeve body 2711, the second movable member 23 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 dividing portion 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).

[0054] like Fig.15 and 16 As shown, the working principle of the middle drum 20 of the present invention to extend and retract between the middle drum radial contraction position MW1 and the middle drum radial first extension position MW2 is as follows: when the middle drum 20 is in the middle drum radial contraction position MW1, the middle drum piston partition 232 is close to the sleeve 271 in the axial direction of the middle drum, and the middle drum connecting member 25 is close to the middle drum body 22 in the accommodating space 29; when the middle drum 20 is 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 member 23 to move in the direction close to the middle drum end member 24, so that the space of the middle drum second chamber 273 becomes larger and the space of the middle drum first chamber 272 becomes smaller; the second moving member 23 pushes the middle drum connecting member 25 on the middle drum end member 24 to move in the direction away from the middle drum axis X3 through the connecting rod 28, and further drives a plurality of middle drum supporting members 21 to move synchronously in the middle drum radial direction in the direction away from the middle drum axis X3, so that the middle drum 20 reaches the middle drum radial first extension position MW2.

[0055] like Fig.14 and 16As shown, preferably, the middle drum connecting member 25 and the middle drum supporting member 21 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 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 251. When the middle drum 20 is in the middle drum radial contraction position MW1, the second elastic reset element 252 is in a free state, and when the middle drum 20 is in the middle drum radial first extension position MW2, the second elastic reset element 252 is in an extension state. When the middle drum 20 moves from the first radial extension position MW2 to the radial contraction position MW1, the gas in the second chamber 273 of the middle drum is extracted. Since the second elastic reset element 252 has an elastic restoring force in the direction of the middle drum axis X3 in the extended state, the middle drum connecting member 25 moves on the middle drum end member 24 in the direction close to the middle drum axis X3 through the elastic restoring force of the second elastic reset element 252, and the second moving member 23 is driven to move in the direction away from the middle drum end member 24 through the connecting rod 28. The movement of the middle drum connecting member 25 drives the plurality of middle drum supporting members 21 to move in the radial direction of the middle drum in the direction close to the middle drum axis X3 to achieve reset. Similarly, when the middle drum 20 returns from the first radial extension position MW2 to the radial contraction position MW1, the gas in the second chamber 273 of the middle drum can be extracted while the gas in the first chamber 272 of the middle drum can be filled with gas to accelerate the return of the middle drum 20 from the first radial extension position MW2 to the radial contraction position MW1. Preferably, the second elastic reset element 252 is a circular ring spring.

[0056] like Figure 2 , 13 As shown in Figure 14, it should be noted that the left center drum 20A described in the present invention has a plurality of left center drum support members 21A, and the right center drum 20B has a plurality of right center drum support members 21B. The outer diameters formed by the plurality of left center drum support members 21A and the plurality of right center drum support members 21B are consistent, and the left center drum support members 21A and the right center drum support members 21B can be arranged in meshing engagement, so that when the forming drum is in the axial contraction state, the first axial extension state and the second axial extension state, the circumferential surface formed by the left center drum 20A and the right center drum 20B always supports the carcass components in the radial direction, and the left center drum 20A and the right center drum 20B will not be completely separated during the process of separating the left center drum 20A and the right center drum 20B, that is, the circumferential surface formed by the left center drum 20A and the right center drum 20B will not be completely disconnected in the radial direction.

[0057] Preferably, when the left middle drum support 21A and the right middle drum support 21B have different structures, the left middle drum support 21A has a non-penetrating slot 211A in the direction close to the middle drum axis X3, and the right middle drum support 21B has a toothed portion 211B meshing with the slot 211A on the left middle drum support. When the left middle drum 20A and the right middle drum 20B are approaching each other, the toothed portion 211B of the right middle drum support moves in the notch 211A on the left middle drum support, so that the left middle drum 20A and the right middle drum 20B will not interfere with each other; when the left middle drum 20A and the right middle drum 20B are moving away from each other, the toothed portion 211B of the right middle drum support moves on the notch 211A of the left middle drum support, and the toothed portion 211B of the right middle drum support is always partially in the notch 211A of the left middle drum support, so that the right middle drum support 21B of the right middle drum and the left middle drum support 21A of the left middle drum will not be completely disconnected. And through the support of the toothed portion 211B on the right middle drum support by the notch 211A on the left middle drum support, the surface of the middle drum can better support the various carcass components during the process of laminating the various carcass components, thereby improving the molding quality of the tire.

[0058] It should be noted that, in order to achieve a more reasonable layout, the side drum 30 is optionally slidably disposed on the outer surface of the shaft sleeve 271 of the middle drum. That is, the first side drum 30A is slidably disposed on the outer surface of the shaft sleeve of the left middle drum 20A, and the second side drum 30B is slidably disposed on the outer surface of the shaft sleeve of the right middle drum 20B. When the first driving device 50 drives the side drum 30 to move closer to or away from the middle drum 20, the side drum 30 slides on the outer surface of the shaft sleeve 271 of the middle drum.

[0059] like Figure 1 As shown, the forming drum described in the present invention also includes a main shaft seat 60, the main shaft 10 is rotatably arranged on the main shaft seat 60, the first rotation driving source 40 is fixedly arranged on the main shaft seat 60, and the driving end of the first rotation driving source 40 is connected to the main shaft 10 through a first transmission device 41 (such as a combination of a synchronous wheel and a synchronous belt).

[0060] like Figures 1 to 3As shown, the first driving device 50 described in the present invention includes an inner shaft 51 sleeved in the main shaft 10, and a first inner sleeve 52 sleeved outside the inner shaft 51, the inner shaft 51 is fixedly connected to the second side drum 30B, the first inner sleeve 52 is fixedly connected to the first side drum 30A, and also includes a first movable driving source 53 that can simultaneously drive the inner shaft 51 and the first inner sleeve 52 to move toward or in the opposite direction along the axial direction of the forming drum, the first movable driving source 53 is fixedly arranged on the main shaft seat 60, and the driving end of the first movable driving source 53 is respectively connected to the inner shaft 51 and the first inner sleeve 52 through a second transmission device. Specifically, the second transmission device includes a first screw rod 541 with threads on both ends arranged in opposite directions, and two first screw rod nuts (not shown) respectively connected to the threads on the two ends of the first screw rod, and the two first screw rod nuts are respectively fixedly connected to the inner shaft 51 and the first inner sleeve 52 through the first connecting member 542 and the second connecting member 543. When the first moving drive source 53 drives the first screw rod 541 to rotate, the two first screw rod nuts are driven to move relatively closer or farther away, thereby driving the inner shaft 51 and the first inner sleeve 52 to move toward or in the opposite direction, and further driving the second side drum 30B and the first side drum 30A respectively connected to the inner shaft 51 and the first inner sleeve 52 to move relatively closer or farther away.

[0061] In order to better realize the axial movement of the inner shaft 51 and the first inner sleeve 52 along the forming drum, the first connecting member 542 and the second connecting member 543 are movably arranged on the main shaft seat 60 through the third moving component 55 (a combination of a slide rail and a slider), and the third moving component 55 is arranged along the axial direction of the forming drum. When the first moving driving source 53 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 through the guidance of the third moving component 55, so that the inner shaft 51 and the first inner sleeve 52 will only move along the axial direction of the forming drum, and no radial movement of the forming drum will occur.

[0062] Furthermore, two groups of first mobile drive sources 53 and first screw rods 541 can be symmetrically arranged, both of which are connected to the inner shaft 51 and the first inner sleeve 52. The two groups of first screw rods 541 are symmetrically arranged on both sides of the first connecting member 542 and both sides of the second connecting member 543, respectively, so as to ensure the position of the second side drum 30B and the first side drum 30A during the movement process, and avoid radial displacement of the second side drum 30B and the first side drum 30A due to unilateral force.

[0063] Similarly, in order to achieve the relative approach or distance between the left middle drum 20A and the right middle drum 20B, the first driving device 50 of the present invention further includes a second inner sleeve 56 and a third inner sleeve 57 sleeved between the inner shaft 51 and the first inner sleeve 52, wherein the third inner sleeve 57 is sleeved outside the second inner sleeve 56, the second inner sleeve 56 is fixedly connected to the right middle drum 20B, and the third inner sleeve 57 is fixedly connected to the left middle drum 20A, and further includes a second movable driving source 58 that can simultaneously drive the second inner sleeve 56 and the third inner sleeve 57 to move toward or in the opposite direction along the axial direction of the forming drum, the second movable driving source 58 is fixedly arranged on the main shaft seat 60, and the driving end of the second movable driving source 58 is respectively connected to the second inner sleeve 56 and the third inner sleeve 57 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.

[0064] like Figure 6 , 17 As shown in FIGS. 17b and 17c, it should be noted that, when the first carcass component 101 is attached to the forming drum and the end of the first carcass component 101 is turned up to form the tire bead 200 to form the second carcass component 102, if the bladder is inflated to realize the first carcass component turning up to form the tire bead, the side drum and the middle drum are at the same adjacent level, and the turning up effect may be poor when the bladder is inflated to turn up, and bubbles may appear between the first carcass component and the tire bead. Because in order to better turn up the tire bead 200 at the end of the first carcass component 101 when the bladder 32 is inflated, the first side drum 30A and the second side drum 30B can be simultaneously extended into the middle drum 20 in the axial direction to form the fourth axial extension state of the forming drum, so that the end of the bladder is located below the tire bead or below the middle drum. At this time, the length of the support surface formed by the left middle drum 20A and the right middle drum 20B is L2, and the overlapping length of the middle drum 20 and the side drum 30 is L4. When the bladder 32 is inflated, the end of the first carcass component 101 is completely in contact with the surface of the bladder 200, and the bladder forms a C-shaped wrapping and extrusion on the end of the first carcass component, so that the first carcass component completely covers the tire bead. The working principle of the forming drum of the present invention is as follows: Figure 1 , 4As shown in Figure 17a, when the second mobile driving source 58 drives the left middle drum 20A and the right middle drum 20B to separate from each other, and the first mobile driving source 53 drives the first side drum 30A and the second side drum 30B to approach each other, the capsule 32 of the first side drum 30A contacts the left middle drum support 21A of the left middle drum 20A, and the capsule 32 of the second side drum contacts the right middle drum support 21B of the right middle drum to realize the first axial extension state of the forming drum; and the left middle drum 20A and the right middle drum 20B are in the radial direction of the middle drum The first stretching position MW2 and the first side drum 30A and the second side drum 30B are in the first radial stretching position EW2 of the side drums. At this time, the left middle drum 20A, the right middle drum 20B and the first side drum 30A and the second side drum 30B are on the same circumferential surface, and are used to receive various carcass components except the sidewall 103, and the main shaft 10 is driven to rotate by the first rotary drive source 40, so as to drive the middle drum 20 and the side drum 30 to rotate at the same time, so as to realize the bonding of various carcass components except the sidewall 103 to form the first carcass component 101; Figure 5 , 10 As shown in FIG. 17b, the first side drum 30A and the second side drum 30B are then retracted to the side drum radial retraction position EW1 by their respective side drum radial driving mechanisms 38. At this time, the diameter D2 of the middle drum 20 is larger than the diameter D1 of the side drum 30, and the side drum 30 no longer supports the two ends of the first carcass assembly 101. Optionally, as shown in FIG. Figure 6 As shown, the first side drum 30A and the second side drum 30B are driven to approach each other by the first moving driving source 53, so that the first side drum 30A is located in the left middle drum 20A, and the second side drum 30B is located in the right middle drum 20B; Fig.17 As shown in FIG. b, the finger-shaped pieces (not shown) located at both ends of the forming drum move to both ends of the above-mentioned first carcass component 101, and lock the two ends of the first carcass component 101, so that the two ends of the first carcass component 101 shrink toward the direction close to the axis X1 of the forming drum, and the tire beads 200 located at both ends of the forming drum pass through the first carcass component 101 and contact the first carcass component at the end of the middle drum through the bead plate (not shown); Fig.17 c, the bladders 32 on the first side drum 30A and the second side drum 30B are then inflated simultaneously, so that the bladders 32 expand and move toward the direction where the middle drum 20 is located, and a force is applied to the bladder 32 in the direction close to the middle drum 20 through a booster mechanism (not shown), so as to drive the two ends of the first carcass component 101 to respectively turn up and wrap the two tire beads 200 to form the second carcass component 102; the first moving driving source drives the two side drums to move relatively away from each other, so that the spacing between the two side drums and the two middle drums is L5, and the turned-up ends of the second carcass components of the side drum and the middle drum are adjacent to each other in the axial direction, so as to form the axial third extension state of the forming drum; as shown in FIG. Figure 7 , 12As shown in Figures 17d and 17d, the radial driving mechanism 38 of the side drum then drives several bladder supporting components 31 to extend synchronously, so that the side drum 30 reaches the second radial extension position EW3 of the side drum, that is, at this time, the diameter D3 of the side drum 30 is larger than the diameter D2 of the middle drum 20, and the surface of the side drum 30 is substantially flush with the upper surface of the second tire body component 102 bonded to the middle drum 20, so as to receive the sidewall 103, and drive the main shaft 10 to rotate through the first rotary driving source 40, so as to drive the middle drum 20 and the side drum 30 to rotate simultaneously, so as to achieve the bonding of the sidewall 103; Figure 8 and 18 As shown, the first mobile driving source 53 then drives the first side drum 30A and the second side drum 30B which are adjacent to and in contact with the second carcass component on the middle drum 20 to move relatively away from each other, so that the first side drum 30A and the second side drum 30B are no longer in contact with the second carcass component on the middle drum 20, and the forming drum is in a second axial extension state, so that the rolling device 300 is convenient for extending between the middle drum 20 and the side drum 30 and close to the edge of the middle drum 20, so as to press the second carcass component 102 and the sidewall 103 on the middle drum 20, and make the two end portions of the sidewall 103 completely fit with the two end portions of the second carcass component 102 to form the carcass component 100; as shown Figure 7 As shown, the side drum radial driving mechanism 38 then drives the side drum 30 to contract to the side drum radial contraction position EW1, the first mobile driving source 53 drives the first side drum 30A and the second side drum 30B to be relatively close to each other and respectively adjacent to the left middle drum 20A and the right middle drum 20B, and the side drum radial driving mechanism 38 further drives the side drum 30 to extend toward the side drum radial second extension position EW3 to support the end of the carcass assembly 100, so that the bladder 32 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 20 and the side drum 30; as shown Figure 3 As shown, the tread assembly that has been bonded on the belt drum is then moved to the outside of the circumference of the carcass assembly 100 on the forming drum, and the left middle drum 20A and the right middle drum 20B are driven to approach each other by the second movable drive source 58, and the first movable drive source 53 drives the first side drum 30A and the second side drum 30B to approach each other, so as to always keep the side drum 30 and the middle drum 20 in adjacent contact and maintain the approximately sealed space between the middle drum and the side drum, that is, the forming drum forms an axially contracted state, and at the same time, the carcass assembly 100 is inflated from the middle drum position, and the carcass assembly 100 is expanded and shaped, so that the carcass assembly 100 is in contact with the tread assembly and bonded, and then the carcass assembly 100 and the tread assembly are pressed together by a rolling device to form a raw tire; then the side drum 30 is driven to contract to the side drum radial contraction position EW1 by the side drum radial drive mechanism 38, and the middle drum 20 is driven to contract to the middle drum radial contraction position MW1 by the middle drum radial drive mechanism 27, the raw tire is unloaded, and the next tire is produced.

[0065] The present invention also provides a molding machine, which has the above-mentioned molding drum 1. By using the molding drum 1, it is possible to realize the one-time molding production of tires with different crown heights and tire widths through a secondary process. That is, the molding drum described in the present invention can be used to mold wide sidewalls and high-section tires in a one-time process, which has the advantages of high production precision and high production efficiency.

[0066] The present invention mainly provides a brand-new forming drum, which is slidingly arranged on the main shaft 10 through the left middle drum 20A and the right middle drum 20B, and the first side drum 30A and the second side drum 30B respectively arranged on the axial outer sides of the left middle drum 20A and the right middle drum 20B. The left middle drum 20A and the right middle drum 20B and the first side drum 30A and the second side drum 30B can be respectively approached and separated from each other in the axial direction 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; through the radial driving mechanism of the middle drum, the middle drum 20 can be moved between the radial contraction position MW1 of the middle drum and the radial first extension position MW2 of the middle drum. Extension and retraction: Through the radial driving mechanism of the side drum, the side drum 30 can be extended and retracted between the radial contraction position EW1, the first radial extension position EW2 and the second radial extension position EW3 of the side drum. Through the movement and extension and retraction coordination between the middle drum 20 and the side drum 30 in the above-mentioned positions and states, it is possible to firstly bond the carcass components to form the first carcass component 101, then reverse the tire bead 200 of the first carcass component 101 to form the second carcass component 102, then bond the sidewall 103 to form the carcass component 100, and then inflate the carcass component 100 to bond the carcass component 100 with the tread component to form a one-step molding production of the raw tire. The first driving device can realize the synchronous approach or separation of the two side drums and the two middle drums in the axial direction, which can be suitable for the production of tires of different widths; and the left middle drum support and the right middle drum support that can be arranged in an engageable manner can better support the tire body components of different widths; the above-mentioned production method can produce tires of any crown height and tire width in one process, which has the advantages of wide production application range and high production efficiency.

[0067] 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 forming drum, characterized in that: It includes 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, and an inflatable capsule that can be extended toward the middle drum is arranged on the circumference of the side drum, wherein the middle drum includes a left middle drum and a right middle drum that are adjacent to each other, and the side drum includes a first side drum and a second side drum that are respectively arranged on the axial outsides of the left middle drum and the right middle drum; a first rotating driving source that can drive 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.

2. The forming drum according to claim 1, 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.

3. The forming drum according to claim 2, 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, and the end of the capsule is arranged at one end of the capsule supporting component close to the middle drum.

4. The forming drum according to claim 3, characterized in that: The side drum includes a side drum body, the side drum body has an outer surface of the side drum body, and also includes a first movable member slidably sleeved on the outer surface of the side drum 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 forming drum according to claim 4, characterized in that: The movement conversion mechanism includes a plurality of first inclined surfaces evenly arranged along the circumference of the first movable member, a plurality of side drum supporting components arranged opposite to the first inclined surfaces, and also includes a second inclined surface arranged on the side drum supporting component opposite to the corresponding first inclined surfaces, the first inclined surface of the first movable member is parallel to the second inclined surface of the side drum supporting component, and also includes a first movable component respectively arranged on the first inclined surface of the first movable member and the second inclined surface of the side drum supporting component.

6. The forming drum according to claim 4, characterized in that: The guiding mechanism includes a side drum end component fixedly arranged at one end of the side drum body, the side drum end component has a circular inner surface, the circular inner surface of the side drum end component is perpendicular to the outer surface of the side drum body, a plurality of protrusions are arranged on the circular inner surface, and T-shaped guide grooves are formed between the protrusions. The guiding mechanism also includes a T-shaped structure arranged at one end of the side drum supporting component, and the T-shaped structure is coupled with the T-shaped guide groove.

7. The forming drum 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.

8. The forming drum according to claim 3, characterized in that: The capsule includes a capsule body arranged on a capsule supporting component, and the end of the capsule body is fixedly arranged on one end of the capsule supporting component close to the middle drum; it also includes a capsule side end vertically connected to the capsule body, and the capsule side end is fixedly arranged on the end of the side drum close to the middle drum away from the end connected to the capsule body.

9. The forming drum according to claim 8, characterized in that: The capsule also includes a connecting portion connected to the capsule body near one end of the middle drum. The connecting portion and the capsule body are in the same horizontal plane, and the position where the connecting portion contacts the end of the middle drum is configured in the same shape as the end of the middle drum.

10. The forming drum according to any one of claims 1 to 9, 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.

11. The forming drum according to claim 10, 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.

12. The forming drum according to claim 10, characterized in that: The left center drum has a plurality of left center drum supporting members, and the right center drum has a plurality of right center drum supporting members. The left center drum supporting members and the right center drum supporting members can be arranged in meshing engagement.

13. The forming drum according to any one of claims 1 to 9, characterized in that: The first drive unit is connected to the spindle seat, the first drive unit is connected to the spindle seat, and the first drive unit is connected to the spindle seat by a first transmission device; the first drive unit includes an inner shaft sleeved in the spindle, and a first inner sleeve sleeved outside the inner shaft, the inner shaft is fixedly connected to the second side drum, the first inner sleeve is fixedly connected to the first side drum, and the first movable drive source can be used to simultaneously drive the inner shaft and the first inner sleeve to move in opposite directions along the axial direction of the forming drum; the first movable drive source is fixedly arranged on the spindle seat, and the first movable drive source The driving end is respectively connected to the inner shaft and the first inner sleeve through a second rotating device; it also includes a second inner sleeve and a third inner sleeve which are sleeved between the inner shaft and the first inner sleeve, wherein the third inner sleeve is sleeved outside the second inner sleeve, the second inner sleeve is fixedly connected to the right middle drum, and the third inner sleeve is fixedly connected to the left middle drum, and also includes a second movable driving source which can simultaneously drive the second inner sleeve and the third inner sleeve to move axially toward or in the opposite direction along the forming drum, the second movable driving source is fixedly arranged on the main shaft seat, and the driving end of the second movable driving source is respectively connected to the second inner sleeve and the third inner sleeve through a third transmission device.

14. A tire building machine, characterized in that: The forming drum comprises the forming drum as described in any one of claims 1 to 13.

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