Block flower segmented mold without generating flower groove rubber edge

Abstract

The invention relates to the technical field of tire molds, and discloses a block pattern segmented mold without generating pattern groove rubber strips, the segmented mold comprises a pattern ring, an upper side plate and a lower side plate, the upper side plate is arranged above the pattern ring, the lower side plate is arranged below the pattern ring, and when the pattern ring moves to be in a mold closing state, the pattern ring is closed. The pattern ring, the upper side plate and the lower side plate are closed to form an annular mold cavity capable of being used for vulcanizing a tire blank, the pattern ring is composed of a plurality of pattern blocks, concave surfaces are arranged between parting surfaces of the pattern blocks and on pattern ribs, rubber edges in tire pattern grooves are effectively prevented from being generated, manpower and material resources are saved, and productivity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tire moulds, in particular to a block flower active mould which does not produce flower groove rubber edges. Background Art

[0002] The appearance of the tire reflects the high-level positioning of the company's products and has also been the focus of market attention in recent years. However, the rubber edge of the tire has a great impact on the appearance, which is also a problem that the industry has been troubled by. The appearance of rubber edge on the all-steel load-bearing radial tire will not only affect its appearance quality and uniformity, but also increase the workload of trimming. If the rubber edge stuck to the mold is not cleaned in time, it will stick to the next tire and cause defective products. If the rubber edge is not cleaned in time, vulcanization will also cause mold extrusion deformation, which will aggravate the rubber edge and form a vicious cycle.

[0003] At present, the design of commonly used molds in tire vulcanization molds is as follows: Figure 1 As shown in the figure, it is composed of an upper side plate, a lower side plate and a pattern ring. The pattern ring includes a number of pattern blocks. The contact surface between two pattern blocks is the parting surface, and there is inevitably a gap between the parting surfaces. This design makes it easy for glue to overflow between the parting surfaces of the pattern blocks, resulting in glue edges in the tire grooves, affecting the appearance of the tire, and also causing glue to easily stick to the mold parting. The glue on the pattern blocks is difficult to handle. If it is not scraped cleanly, the glue edge will vulcanize and enter the next batch of tire blanks, which will cause debris on the parting surface. After the tire is out of the pot, the glue edge on the tire is too soft and difficult to cut cleanly, increasing the workload.

[0004] The Chinese invention patent (publication number: CN2895010Y, publication date: 2007.05.02) discloses a flexible mold for shaping and vulcanizing tire blanks, including a lower mold, an upper mold and a plurality of radially movable pattern blocks. When the pattern blocks move to a closed mold state, the upper mold, the lower mold and the pattern blocks enclose an annular mold cavity for vulcanizing the tire blank. There are concave overflow grooves in the joint surfaces between the pattern blocks and the upper mold, and between the pattern blocks and the lower mold to collect the rubber overflowing from the mold cavity. The overflow rubber that may occur during the tire production process is collected in the overflow groove. When the tire is vulcanized, the rubber strip in the overflow groove is demolded together with the finished tire. The rubber strip can be separated from the tire by a slight pull, and the joint surfaces of the mold cavity continue to remain smooth and clean. Although this design reduces the workload of mold cleaning and increases the service life of the mold, it does not solve the problem of tire groove rubber strips, and does not fundamentally solve the problem of rubber edge generation. It is still necessary to trim the rubber edge after the tire is vulcanized, which consumes manpower and material resources. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a flexible mold that does not produce rubber edges in the tire grooves, effectively avoiding the production of rubber edges in the tire grooves, saving manpower and material resources, and improving productivity.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: A block tread active mold that does not produce tread groove rubber edges, the active mold comprising a tread ring, an upper side plate and a lower side plate, the upper side plate being arranged above the tread ring, and the lower side plate being arranged below the tread ring, when the tread ring moves into a mold closing state, the tread ring, the upper side plate and the lower side plate are closed to form an annular mold cavity that can be used to vulcanize a tire blank, the tread ring is composed of a plurality of tread blocks, the tread blocks are provided with tread ribs, the tread ribs are located between adjacent tread blocks, a concave surface with a flat bottom is arranged at the parting surface position and on the inner side surface of the tread ribs, the bottom depth of the concave surface is 1-3mm, the two side walls of the concave surface are inclined at 45-55°, and the bottom length of the concave surface is 6-10mm.

[0007] Preferably, the bottom of the concave surface is 2 mm deep, the two side walls of the concave surface are inclined at 50°, and the bottom of the concave surface is 8 mm long.

[0008] Preferably, the angles between the bottom of the concave surface and the walls on both sides of the concave surface are chamfered, and the chamfer radius is 2-4 mm.

[0009] Preferably, the junctions between the two side walls of the concave surface and the block ribs are chamfered, and the chamfer radius is 1-3mm.

[0010] The beneficial effects of the present invention are as follows: concave surfaces are arranged between the parting surfaces of the pattern blocks and on the ribs, which effectively avoids the generation of rubber edges in the tire grooves, saves manpower and material resources, and improves productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall view of the flexible mold involved in the implementation method.

[0012] Figure 2 It is a schematic diagram of the location of the rib parting surface of the pattern block.

[0013] Figure 3 This is a schematic diagram of the structure of block ribs.

[0014] Figure 4 for Figure 3 A partial enlarged view of point A in the middle. Figure numerals: 1-parting surface, 2-pattern rib, 21-concave surface, 3-upper side plate, 4-lower side plate, 5-pattern circle, 51-pattern block. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0016] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0017] Figure 1 FIG. 1 is an overall view of the flexible mold involved in the embodiment. The flexible mold includes a pattern ring 5, an upper side plate 3 and a lower side plate 4. The upper side plate 3 is arranged above the pattern ring 5, and the lower side plate 4 is arranged below the pattern ring 5. The pattern ring 5 is composed of a plurality of pattern blocks 51. The contact surface between the pattern blocks 51 is the parting surface 1. Figure 2 When the pattern ring 5, the upper side plate 3 and the lower side plate 4 are moved into the mold closing state, they are closed to form an annular mold cavity which can be used to vulcanize the tire blank.

[0018] Example 1 A block pattern active mold without producing groove rubber edges, the active mold comprising a pattern ring 5, an upper side plate 3 and a lower side plate 4, the upper side plate 3 is arranged above the pattern ring 5, and the lower side plate 4 is arranged below the pattern ring 5. When the pattern ring 5 moves into a mold closing state, the pattern ring 5, the upper side plate 3 and the lower side plate 4 form an annular mold cavity that can be used to vulcanize a tire blank, the pattern ring 5 is composed of a plurality of pattern blocks 51, and the pattern blocks 51 are provided with block pattern ribs 2, and the block pattern ribs 2 are located between adjacent block patterns, such as Figure 3 , 4 As shown, a concave surface 21 with a flat bottom is arranged at the position of the parting surface 1 and on the inner side surface of the block rib 2.

[0019] In the design, the block pattern generally has a wider groove width, more tortuous groove bottom direction, and deeper pattern depth. Combined with the action of the vulcanizer, a part of the rubber will be squeezed out of the parting surface 1 before the mold is closed. The present invention designs a concave surface 21 on the rib at the tire groove bottom position corresponding to the mold pattern block parting surface 1, which can effectively prevent the rubber from overflowing the parting surface 1 due to fluidity before the mold is closed. The concave surface 21 can effectively block the escape of the rubber, so that the rubber at the flow position of the parting surface 1 is stored inside the concave surface 21. At the same time, the concave surface 21 is designed to produce a wear mark at the groove bottom, which does not affect the tire pattern design effect.

[0020] The concave surface 21 is set to have a bottom depth of 1-3mm, the two side walls of the concave surface 21 are inclined at 45-55°, and the bottom of the concave surface 21 is 6-10mm long. In this embodiment, the bottom of the concave surface 21 is 2mm deep, the two side walls of the concave surface 21 are inclined at 50°, and the bottom of the concave surface 21 is 8mm long.

[0021] The angles between the bottom of the concave surface 21 and the walls on both sides of the concave surface 21 are chamfered, and the chamfer radius is set to 2-4 mm.

[0022] The connection between the two side walls of the concave surface 21 and the block pattern rib 2 is also chamfered, and the chamfer radius is 1-3mm. Specifically, the chamfer can be 1mm, 3mm, or other values, and is set to 2mm in this embodiment.

[0023] When the tire is vulcanized, the rubber edges that would have been produced between the parting surfaces of the pattern blocks enter the concave surface 21 due to the force and the setting of the concave surface 21, and at the same time form a part of the pattern on the tire. After the vulcanization is completed, there is no need to clean the mold or trim the rubber edges on the tire, which effectively saves manpower and material resources and improves productivity.

[0024] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed herein.

Claims

1. A block tread active mold without producing tread groove rubber edges, the active mold comprising a tread ring, an upper side plate and a lower side plate, the upper side plate being arranged above the tread ring, and the lower side plate being arranged below the tread ring, when the tread ring moves into a mold closing state, the tread ring, the upper side plate and the lower side plate are closed to form an annular mold cavity that can be used for vulcanizing a tire blank, characterized in that: The pattern ring is composed of a plurality of pattern blocks, on which pattern blocks are provided pattern ribs (2), the pattern ribs (2) being located between adjacent pattern blocks, and a concave surface (21) having a flat bottom is provided at the position of the parting surface and on the inner side surface of the pattern ribs (2), the bottom depth of the concave surface (21) being 1-3 mm, the two side walls of the concave surface (21) being inclined at 45-55 degrees, and the bottom length of the concave surface (21) being 6-10 mm.

2. The flexible mold according to claim 1, characterized in that: The bottom depth of the concave surface (21) is 2 mm, the walls on both sides of the concave surface (21) are inclined at 50 degrees, and the bottom length of the concave surface (21) is 8 mm.

3. The flexible mold according to claim 1, characterized in that: The angles between the bottom of the concave surface (21) and the walls on both sides of the concave surface (21) are chamfered, and the chamfer radius is 2-4 mm.

4. The flexible mold according to claim 1, characterized in that: The connection between the two side walls of the concave surface (21) and the block rib (2) is chamfered, and the chamfer radius is 1-3 mm.

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