A tire mold

Abstract

The present invention discloses a tire mold, comprising a movable block, an upper tire side plate and a lower tire side plate, wherein a plurality of movable blocks cooperate with the upper tire side plate and the lower tire side plate to form a tire mold cavity, the sharp-angled tip of the movable block and the upper tire side plate in contact with the green tire is set as a circular arc surface, and the sharp-angled tip of the movable block and the lower tire side plate in contact with the green tire is set as a circular arc surface; in application, by setting the sharp-angled tip of the movable block and the upper tire side plate or the lower tire side plate in contact with the green tire as a circular arc surface, it can be avoided that the edge of the upper tire side plate or the lower tire side plate directly penetrates into the green tire when the mold is closed, thereby reducing the probability of generating rubber edges after the tire is vulcanized, and helping to achieve the goals of saving rubber materials, improving production efficiency and reducing manufacturing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of tire manufacturing equipment, in particular to a tire mold. Background Art

[0002] like Figure 1 As shown, the current tire mold generally uses a movable block 01, an upper tire side plate 02 and a lower tire side plate 03 to form a tire cavity. At the mold interface between the movable block 01 and the upper tire side plate 02 or the lower tire side plate 03, the edge of the upper tire side plate 02 or the lower tire side plate 03 is sharp, which can easily pierce the green tire 04 during vulcanization and mold closing. Figure 2 and Figure 3 As shown, the mold is clamped with rubber material, and the tire has a rubber edge, or the mold contour interferes with the outer contour of the green tire 03 when the mold is closed, resulting in the mold clamping rubber material and the tire 05 having a rubber edge 06.

[0003] To address the phenomenon of side glue produced after tire vulcanization, the current only way is to create side glue grooves to form side glue that can be quickly shaved off later. However, the side glue formed by the side glue grooves needs to be manually or mechanically shaved off later, resulting in problems such as wasting rubber, delaying production progress, and increasing manufacturing costs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a tire mold to avoid the generation of rubber edges, save the subsequent shaving process, and achieve the purpose of saving rubber, improving production efficiency, and reducing manufacturing costs.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tire mold includes a movable block, an upper side plate and a lower side plate. A plurality of the movable blocks cooperate with the upper side plate and the lower side plate to form a tire mold cavity. The acute-angled tip of the joint between the movable block and the upper side plate that contacts the green tire is set as an arc surface. The acute-angled tip of the joint between the movable block and the lower side plate that contacts the green tire is set as an arc surface.

[0007] Preferably, the radius R of the arc surface satisfies 0.5 mm ≤ R ≤ 4 mm.

[0008] Preferably, the ratio of the depth Hs of the forming groove of the movable block along the radial direction of the tire cavity to the cross-sectional height H of the tire cavity satisfies Hs: H=0.1-0.3.

[0009] Preferably, it also includes a mold sleeve, and each movable block is slidably connected to the inner wall of the mold sleeve. Each movable block moves away from the central axis of the tire mold cavity in the radial direction of the tire mold cavity as the mold sleeve moves upward, and each movable block approaches the central axis of the tire mold cavity in the radial direction of the tire mold cavity as the mold sleeve moves downward.

[0010] Preferably, it further comprises a liftable upper deck, and the upper tire side plates are arranged on the upper deck.

[0011] Preferably, the mold sleeve is hung on the upper supporting plate.

[0012] Preferably, it further comprises a lower supporting plate, and the lower tire side plate is arranged on the lower supporting plate.

[0013] Preferably, a sliding guide structure arranged along the radial direction of the tire cavity is provided between the upper supporting plate and the movable block and / or between the lower supporting plate and the movable block.

[0014] Preferably, a limited guide structure is provided between the mold sleeve and the lower support plate.

[0015] Preferably, the movable block includes a slider and a tread module, and the tread module is detachably connected to the slider.

[0016] To achieve the above-mentioned purpose, the present invention provides a tire mold, which includes a movable block, an upper side plate and a lower side plate, wherein multiple movable blocks cooperate with the upper side plate and the lower side plate to form a tire cavity, and the sharp-angled tip of the movable block and the upper side plate in contact with the green tire is set as an arc surface, and the sharp-angled tip of the movable block and the lower side plate in contact with the green tire is set as an arc surface; in application, by setting the sharp-angled tip of the movable block and the upper side plate or the lower side plate in contact with the green tire as an arc surface, it can be avoided that the edge of the upper side plate or the lower side plate directly penetrates into the green tire when the mold is closed, thereby reducing the probability of rubber edges after the tire is vulcanized, which helps to save rubber, improve production efficiency and reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of a tire mold in the prior art;

[0019] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0020] Figure 3 A schematic diagram of a tire structure produced by a tire mold in the prior art;

[0021] Figure 4A schematic structural diagram of a tire mold provided by an embodiment of the present invention;

[0022] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the partial structure of the tire mold after mold closing provided by an embodiment of the present invention.

[0024] Among them, 1 is a movable block; 101 is a slider; 102 is a tread module; 2 is an upper tire side plate; 3 is a lower tire side plate; 4 is a mold sleeve; 5 is an upper supporting plate; 6 is a lower supporting plate; 7 is a limiting boss; 8 is a limiting slide; 9 is a limiting groove; 10 is an arc surface. DETAILED DESCRIPTION

[0025] The core of the present invention is to provide a tire mold to avoid the generation of rubber edges, save the later shaving process, and achieve the purpose of saving rubber, improving production efficiency and reducing manufacturing costs.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 4 and Figure 5 , Figure 4 This is a schematic structural diagram of a tire mold provided by an embodiment of the present invention. Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0028] An embodiment of the present invention provides a tire mold, comprising a movable block 1 , an upper side plate 2 , and a lower side plate 3 .

[0029] Among them, multiple movable blocks 1 cooperate with the upper tire side plate 2 and the lower tire side plate 3 to form a tire cavity, and the acute angle tip of the joint between the movable block 1 and the upper tire side plate 2 in contact with the green tire is set as a circular arc surface 10, and the acute angle tip of the joint between the movable block 1 and the lower tire side plate 3 in contact with the green tire is set as a circular arc surface 10.

[0030] In summary, compared with the prior art, the tire mold provided by the embodiment of the present invention can avoid the edge of the upper side plate 2 or the lower side plate 3 directly piercing into the green tire when the mold is closed by setting the sharp-angled tip of the joint between the movable block 1 and the upper side plate 2 or the lower side plate 3 that contacts the green tire as an arc surface 10, thereby reducing the probability of rubber edges being generated after the tire is vulcanized, and helping to save rubber, improve production efficiency, and reduce manufacturing costs.

[0031] Preferably, the radius R of the arc surface 10 satisfies 0.5 mm ≤ R ≤ 4 mm.

[0032] To further optimize the above technical solution, in an embodiment of the present invention, Figure 6 As shown, the ratio of the depth Hs of the molding groove of the movable block 1 along the radial direction of the tire cavity to the cross-sectional height H of the tire cavity satisfies Hs: H = 0.1 ~ 0.3. By reducing the depth Hs of the molding groove of the movable block 1 along the radial direction of the tire cavity, the diameter point of the mold joint surface increases when the mold is closed, that is, the contact point of the upper tire side plate 2 or the lower tire side plate 3 with the green tire moves outward along the radial direction of the tire cavity, so that the edge of the upper tire side plate 2 or the lower tire side plate 3 is in smooth contact with the contour of the green tire. Accordingly, with the same aspect ratio specification, the tire cross-sectional width increases, and the Hs value increases accordingly. With the same tire cross-sectional width specification, the aspect ratio increases, and the Hs value increases accordingly.

[0033] like Figure 4 As shown, the tire mold provided by the embodiment of the present invention also includes a mold sleeve 4, and each movable block 1 is slidably connected to the inner wall of the mold sleeve 4. The inner wall of the mold sleeve 4 is an inclined surface, so that each movable block 1 moves away from the central axis of the tire cavity along the radial direction of the tire cavity as the mold sleeve 4 moves upward, and each movable block 1 moves close to the central axis of the tire cavity along the radial direction of the tire cavity as the mold sleeve 4 moves downward, thereby achieving the purpose of closing or opening the mold.

[0034] Furthermore, the tire mold also includes a liftable upper support plate 5, and the upper tire side plate 2 is arranged on the upper support plate 5. When closing or opening the mold, the upper support plate 5 and the mold sleeve 4 can move synchronously or independently.

[0035] As preferably, Figure 4 As shown, the mold sleeve 4 is hung on the upper support plate 5, so that the mold can rise or fall synchronously with the upper support plate 5, and can also rise or fall independently.

[0036] like Figure 4 As shown, the tire mold further includes a lower supporting plate 6 , and the lower tire side plate 3 is arranged on the lower supporting plate 6 .

[0037] To facilitate mold closing and opening, in an embodiment of the present invention, a sliding guide structure arranged along the radial direction of the tire cavity is provided between the upper supporting plate 5 and the movable block 1 and / or between the lower supporting plate 6 and the movable block 1. Specifically, the sliding guide structure includes a slider 101 and a slide groove that cooperate with each other. The slider 101 is provided on one of the upper supporting plate 5 and the movable block 1, and the slide groove is provided on the other of the upper supporting plate 5 and the movable block 1. The sliding guide structure between the lower supporting plate 6 and the movable block 1 is arranged in the same manner as the sliding guide structure between the upper supporting plate 5 and the movable block 1 mentioned above.

[0038] To further optimize the above technical solution, a limited guide structure is provided between the mold sleeve 4 and the lower support plate 6, such as Figure 4 As shown, the limiting guide structure includes a limiting boss 7 extending upward from the edge of the lower supporting plate 6, a limiting slide groove 8 arranged on the outer peripheral surface of the mold sleeve 4, and a limiting groove 9 arranged on the lower supporting plate 6. During the mold closing process, the mold sleeve 4 first contacts the limiting boss 7 on the lower supporting plate 6, and the limiting boss 7 cooperates with the limiting slide groove 8 to guide and position the mold sleeve 4. When the mold sleeve 4 descends to the final mold closing position, the lower end of the mold sleeve 4 cooperates with the limiting groove 9, thereby limiting the mold sleeve 4 in the radial and circumferential directions to avoid misalignment of the movable block 1.

[0039] As preferably, Figure 4 As shown, the movable block 1 includes a slider 101 and a tread module 102. The tread module 102 is detachably connected to the slider 101. In this way, only the easily damaged tread module 102 needs to be replaced without replacing the entire movable block 1, saving maintenance costs.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tire mold, comprising a movable block, an upper side plate, and a lower side plate, wherein a plurality of movable blocks cooperate with the upper side plate and the lower side plate to form a tire mold cavity, characterized in that: The sharp-angled tip of the junction between the movable block and the upper side plate and in contact with the green tire is set as a circular arc curved surface, and the sharp-angled tip of the junction between the movable block and the lower side plate and in contact with the green tire is set as a circular arc curved surface; The radius R of the arc surface satisfies 0.5mm≤R≤4mm; The ratio of the depth Hs of the forming groove of the movable block along the radial direction of the tire cavity to the cross-sectional height H of the tire cavity satisfies Hs: H=0.1~0.3; The mold sleeve further comprises a mold sleeve, wherein each movable block is slidably connected to an inner wall of the mold sleeve, and each movable block moves away from the central axis of the tire mold cavity in the radial direction of the tire mold cavity as the mold sleeve moves upward, and each movable block moves closer to the central axis of the tire mold cavity in the radial direction of the tire mold cavity as the mold sleeve moves downward; It also includes a liftable upper deck, and the upper tire side plate is arranged on the upper deck; The mold sleeve is hung on the upper bearing plate; It also includes a lower deck, and the lower tire side plate is arranged on the lower deck; A sliding guide structure arranged along the radial direction of the tire cavity is provided between the upper plate and the movable block and / or between the lower plate and the movable block; The sliding guide structure includes a slider and a slide groove that cooperate with each other, the slider is arranged on one of the upper plate and the movable block, and the slide groove is arranged on the other of the upper plate and the movable block; A limited position guide structure is provided between the mold sleeve and the lower support plate; The limiting guide structure includes a limiting boss extending upward from the edge of the lower support plate, a limiting slide groove provided on the outer peripheral surface of the mold sleeve, and a limiting groove provided on the lower support plate; The movable block includes a slider and a tread module, and the tread module is detachably connected to the slider.

Images