Tread profile plate with base glue gradient

Abstract

The utility model provides a kind of base glue gradual change's tread mouth plate, it solves the problem that current tread mouth plate is small in application range and low in production efficiency in base glue extrusion forming process. Including pre mouth plate and the mouth plate main body closely matched with it, mouth plate main body includes detachably connected upper plate and lower plate;The side of lower plate top close to pre mouth plate is equipped with sliding slot along the length direction of lower plate, two symmetrical glue baffle of sliding connection are in sliding slot, and the top of glue baffle is flush with lower plate top;The opposite side of two glue baffles and the bottom surface of sliding slot are enclosed to form base glue runner, and the inside of glue baffle is equipped with inclined gradual change edge;The side of upper plate bottom close to front end is equipped with glue outlet, and base glue runner end communicates with glue outlet. The utility model is widely applied in semi-steel tire processing equipment technical field.

Description

Technical Field

[0001] This application relates to the technical field of semi-steel tire processing equipment, and more specifically, to a tread bead plate with a base rubber gradient. Background Technology

[0002] In the tread extrusion molding process of semi-steel tires, the tread is typically composed of a crown rubber and a base rubber. The base rubber is the basic layer connecting the tread to the tire carcass, and its bonding effect directly affects the structural strength of the tire. Traditionally, the base rubber flow channels within the tread bead are straight, and the thickness of the base rubber extruded through a traditional bead is fixed, lacking a gradual change in side profile. This structure presents the following problems: the limited contact area between the base rubber edge and the tire carcass easily leads to stress concentration at the joint. Over long-term use, these stress-concentrated areas are prone to delamination, affecting tire lifespan and posing safety hazards. Furthermore, the fixed size and shape of the flow channels necessitate a complete bead replacement to accommodate different tread widths, resulting in time-consuming changeovers, low production efficiency, and potential damage to positioning accuracy, impacting tread molding quality. Summary of the Invention

[0003] To address the aforementioned problems, the present invention provides a tread die plate with a gradient base rubber, solving the issues of limited applicability and low production efficiency of existing tread die plates in the base rubber extrusion molding process. It includes a pre-die plate and a die plate body that fits tightly against it. The die plate body includes a detachably connected upper plate and a lower plate. A groove is provided along the length of the lower plate on the top side near the pre-die plate, within which two symmetrical rubber-blocking plates are slidably connected. The tops of the rubber-blocking plates are flush with the top of the lower plate. The opposing sides of the two rubber-blocking plates and the bottom of the groove form a base rubber flow channel, with an inclined gradient edge on the inner side of the rubber-blocking plates. A rubber outlet is provided on the bottom side of the upper plate near the front end, and the end of the base rubber flow channel communicates with the rubber outlet.

[0004] Preferably, the bottom surface of the base adhesive channel is a gradually tapered slope extending along the extrusion direction, and the transition between the gradually tapered slope and the gradually tapered edge of the baffle is continuous and seamless.

[0005] Preferably, the pre-gutter plate is provided with a base adhesive main channel, the outlet end of the base adhesive main channel is connected to the inlet end of the base adhesive flow channel, and the base adhesive main channel is connected to the bottom side of the outlet through the base adhesive flow channel.

[0006] Preferably, the pre-cut plate is further provided with a main flow channel for the wing rubber, a main flow channel for the first crown rubber, and a main flow channel for the second crown rubber. An inner plate is provided between the upper plate and the pre-cut plate, and the inner plate is provided with a connecting flow channel corresponding to the rubber outlet and a wing rubber flow channel corresponding to the main flow channel for the wing rubber. The main flow channel for the wing rubber is connected to both sides of the rubber outlet through the wing rubber flow channel, and the main flow channels for the first crown rubber and the second crown rubber are both connected to the top side of the rubber outlet through the connecting flow channel.

[0007] Preferably, the cross-sectional shape of the wing rubber flow channel matches the cross-sectional shape of the wing rubber main flow channel, and the cross-sectional shape of the connecting flow channel matches the cross-sectional shape of the first crown rubber main flow channel and the second crown rubber main flow channel.

[0008] Preferably, the upper plate and the lower plate are connected by bolts.

[0009] The beneficial effects of this utility model are as follows: The top of the lower plate is provided with a groove, within which two symmetrical rubber-blocking plates are slidably connected. By sliding the rubber-blocking plates, the spacing between them can be changed, thereby adjusting the width of the base rubber and adapting to the production needs of different tread specifications. This eliminates the need for a complete replacement of the die plate, shortening changeover time and improving production efficiency. The inner side of the rubber-blocking plates has a gradient edge. Under the action of this gradient edge, the side surface of the base rubber can form a continuous gradient shape. Compared to traditional fixed-thickness base rubber, this reduces stress concentration points at the tread and crown belt contact points, lowering the risk of tread delamination and effectively balancing tire rolling resistance, comfort performance, and other overall vehicle performance. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the pre-cutting plate in this utility model; Figure 2 This is a schematic diagram of the main structure of the mouth-shaped plate in this utility model; Figure 3 This is a structural schematic diagram of the mouth-shaped plate body and inner plate of this utility model.

[0012] Symbol explanations in the diagram: 1. Pre-cut plate; 2. Upper plate; 3. Lower plate; 4. Glue baffle; 5. Inner plate; 101. Base glue main channel; 102. Wing glue main channel; 103. First crown glue main channel; 104. Second crown glue main channel; 201. Glue outlet; 301. Gradient slope; 302. Groove; 303. Base glue flow channel; 401. Gradient edge; 501. Wing glue flow channel; 502. Connecting flow channel. Detailed Implementation

[0013] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0014] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0015] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] The present application will now describe a tread bead with a base rubber gradient provided in an embodiment of the present application.

[0017] Please see Figures 1 to 3 The base rubber gradient tread bead plate includes a pre-bead plate 1 and a bead plate body that fits tightly against it. The bead plate body includes an upper plate 2 and a lower plate 3 that are detachably connected. In this embodiment, the upper plate 2 and the lower plate 3 are connected by bolts. A groove 302 is provided along the length of the lower plate 3 on the side of the top of the lower plate 3 near the pre-bead plate 1. Two symmetrical rubber baffles 4 are slidably connected in the groove 302. The top of the rubber baffles 4 is flush with the top of the lower plate 3 to ensure that there is no step gap when it is fitted with the upper plate 2. The opposite sides of the two rubber baffles 4 and the bottom surface of the groove 302 form a base rubber flow channel 303. An inclined gradient edge 401 is provided on the inner side of the rubber baffles 4. The rubber baffles 4 are used to limit the extrusion width of the base rubber, and the gradient edge 401 is used to gradually shape the sides of the base rubber. The bottom of the upper plate 2 is provided with a glue outlet 201 on the side near the front end. The end of the base glue channel 303 is connected to the glue outlet 201, so that the base glue that has undergone gradient treatment can enter the glue outlet 201 to complete the final molding.

[0018] Furthermore, the bottom surface of the base adhesive channel 303 is a gradually tapered slope 301 extending along the extrusion direction. The transition between the gradually tapered slope 301 and the gradually tapered edge 401 of the baffle plate 4 is continuous and seamless, so as to avoid stress concentration points at the transition point.

[0019] In one embodiment, the baffle plate 4 is specifically provided with locking holes, and the side wall of the slide groove 302 is provided with multiple locking member mounting holes. The locking holes and locking members engage with each locking member mounting hole to fix the position of the baffle plate 4. In use, the locking members can fix the baffle plate 4 after it has been adjusted to a specified width, preventing displacement of the baffle plate 4 due to rubber pressure during extrusion. In this embodiment, the locking member mounting holes are evenly spaced, and the locking members include, but are not limited to, bolts.

[0020] In this embodiment, the pre-form plate 1 is provided with a base adhesive main channel 101. The outlet end of the base adhesive main channel 101 is connected to the inlet end of the base adhesive flow channel 303. The base adhesive main channel 101 is connected to the bottom side of the adhesive outlet 201 through the base adhesive flow channel 303.

[0021] Furthermore, the pre-cut plate 1 is also provided with a main channel 102 for the wing rubber, a main channel 103 for the first crown rubber, and a main channel 104 for the second crown rubber. An inner plate 5 is provided between the upper plate 2 and the pre-cut plate 1 for close contact. The inner plate 5 is provided with a connecting channel 502 corresponding to the outlet 201 and a wing rubber flow channel 501 corresponding to the main channel 102 for the wing rubber. The main channel 102 for the wing rubber is connected to both sides of the outlet 201 through the wing rubber flow channel 501. The main channel 103 for the first crown rubber and the main channel 104 for the second crown rubber are both connected to the top side of the outlet 201 through the connecting channel 502.

[0022] Furthermore, the cross-sectional shape of the tire wing rubber flow channel 501 matches the cross-sectional shape of the tire wing rubber main flow channel 102, and the cross-sectional shape of the connecting flow channel 502 matches the cross-sectional shape of the first crown rubber main flow channel 103 and the second crown rubber main flow channel 104 to ensure the stability of the rubber material flow.

[0023] The working process of this utility model is as follows: In use, firstly, according to the requirements of the tire tread specifications, slide the rubber baffle 4 along the slide groove 302 to the preset position, and fix the rubber baffle 4 with the locking component; then, assemble the inner plate 5 between the upper plate 2 and the pre-cut plate 1 to ensure accurate docking of each flow channel, and then connect the upper plate 2 and the lower plate 3 with bolts. During production, the base rubber enters the base rubber flow channel 303 through the base rubber main flow channel 101 of the pre-cut plate 1, and forms a gradient shape under the action of the gradient edge 401 and the gradient slope 301 of the rubber baffle 4. At the same time, the tire wing rubber enters the two sides of the outlet 201 through the tire wing rubber main flow channel 102 and the tire wing rubber flow channel 501, and the crown rubber enters the top side of the outlet 201 through the first crown rubber main flow channel 103, the second crown rubber main flow channel 104 and the connecting flow channel 502. The three are compounded in the outlet 201 and then extruded into shape.

[0024] In this invention, the top of the lower plate 3 is provided with a groove 302, within which two symmetrical rubber baffles 4 are slidably connected. By sliding the rubber baffles 4, the spacing between them can be changed, thereby adjusting the width of the base rubber and adapting to the production needs of different tread specifications. This eliminates the need for a complete replacement of the die plate, shortening changeover time and improving production efficiency. The inner side of the rubber baffles 4 is provided with a gradient edge 401. Under the action of the gradient edge 401, the side surface of the base rubber can form a continuous gradient shape. Compared to traditional fixed-thickness base rubber, this reduces stress concentration points at the tread and crown belt contact points, lowers the risk of tread delamination, and effectively balances tire rolling resistance, comfort performance, and other overall vehicle performance.

[0025] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A tread bead with a gradient base rubber, comprising a pre-bead plate and a bead plate body tightly fitted thereto, the bead plate body comprising a detachably connected upper plate and a lower plate; characterized in that: A groove is provided on the top of the lower plate near the pre-formed plate along the length of the lower plate. Two symmetrical glue-blocking plates are slidably connected in the groove, and the top of the glue-blocking plates is flush with the top of the lower plate. The opposite sides of the two glue-blocking plates and the bottom surface of the groove form a base glue flow channel. The inner side of the glue-blocking plates has an inclined gradient edge. A glue outlet is provided on the bottom of the upper plate near the front end, and the end of the base glue flow channel is connected to the glue outlet.

2. The tread bead with a base rubber gradient as described in claim 1, characterized in that: The bottom surface of the base adhesive channel is a gradually tapered slope extending along the extrusion direction, and the transition between the gradually tapered slope and the gradually tapered edge of the adhesive baffle is continuous and seamless.

3. The tread bead with a gradient base rubber as described in claim 1, characterized in that: The pre-grooving plate is provided with a base adhesive main channel, the outlet end of the base adhesive main channel is connected to the inlet end of the base adhesive flow channel, and the base adhesive main channel is connected to the bottom side of the adhesive outlet through the base adhesive flow channel.

4. The tread bead with a base rubber gradient as described in claim 3, characterized in that: The pre-cut plate is further provided with a main flow channel for the wing rubber, a main flow channel for the first crown rubber, and a main flow channel for the second crown rubber. An inner plate is provided between the upper plate and the pre-cut plate for tight fit. The inner plate is provided with a connecting flow channel corresponding to the rubber outlet and a wing rubber flow channel corresponding to the main flow channel for the wing rubber. The main flow channel for the wing rubber is connected to both sides of the rubber outlet through the wing rubber flow channel. The main flow channel for the first crown rubber and the main flow channel for the second crown rubber are both connected to the top side of the rubber outlet through the connecting flow channel.

5. The tread bead with a base rubber gradient as described in claim 4, characterized in that: The cross-sectional shape of the tire wing rubber flow channel matches the cross-sectional shape of the tire wing rubber main flow channel, and the cross-sectional shape of the connecting flow channel matches the cross-sectional shapes of the first crown rubber main flow channel and the second crown rubber main flow channel.

6. The tread bead with a base rubber gradient as described in claim 1, characterized in that: The upper plate and the lower plate are connected by bolts.

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