Scratch-resistant tire mold and processing method

Abstract

The invention discloses a scratch-resistant tire mold and a processing method, which belongs to the technical field of tire molds and comprises a side plate, wherein the side plate is provided with a cavity surface, the cavity surface is provided with a texture, the texture comprises a plurality of orderly arranged concave surfaces, convex ribs are arranged between adjacent concave surfaces; the concave surfaces are surrounded by the convex ribs to form a closed surface; the concave surfaces are coated with a non-stick coating; the cavity surface corresponding to the tire sidewall position of the invention is provided with a texture, the texture consists of a concave surface and convex ribs, and the concave surface is surrounded by the convex ribs; during the vulcanization process, when an information plate flows with tire blank rubber material, the convex ribs can prevent the information plate from contacting the concave surface, which can not only effectively protect the non-stick coating on the concave surface, but also will not leave continuous long strip scratches on the cavity surface, thereby improving the scratch resistance of the cavity surface and further improving the service life of the tire mold.

Description

Technical Field

[0001] The invention relates to the technical field of tire molds, and in particular to a scratch-resistant tire mold and a processing method thereof. Background Art

[0002] Existing molded tires usually need to be affixed with information plates at their sidewalls, and the information plates are usually made of metal. In order to firmly affix the information plates to the tire sidewalls, when the tire is vulcanized, the information plates need to be placed on the cavity surface of the tire mold corresponding to the tire sidewalls, so that the information plates can be tightly attached to the tire sidewalls when the tire is vulcanized.

[0003] However, during the vulcanization process of the tire, the tire embryo needs to withstand tremendous pressure. The flow of the tire embryo rubber will drive the information plate to move. The metal information plate will cause continuous long scratches on the cavity surface of the tire mold, which will affect the subsequent vulcanization effect of the tire surface and reduce the service life of the tire mold.

[0004] Therefore, developing and designing a scratch-resistant tire mold and processing method that can effectively reduce the wear of the information plate on the cavity surface and thus increase the service life is a problem that needs to be solved urgently at this stage. Summary of the invention

[0005] In response to the problems existing in the prior art, the present invention provides a scratch-resistant tire mold and a processing method, wherein a texture is provided on the cavity surface corresponding to the tire sidewall position, the texture is composed of a concave surface and convex ribs, and the concave surface is surrounded by the convex ribs; during the vulcanization process, when the information plate flows with the tire blank rubber, the convex ribs can prevent the information plate from contacting the concave surface, which can not only effectively protect the non-stick coating on the concave surface, but also will not leave continuous long scratches on the cavity surface, thereby improving the scratch resistance of the cavity surface and thereby increasing the service life of the tire mold.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In the first aspect, the present invention provides a scratch-resistant tire mold, including a side plate, wherein the side plate has a cavity surface, the cavity surface has a texture, the texture includes a plurality of orderly arranged concave surfaces, and convex ribs are provided between adjacent concave surfaces; the concave surfaces are surrounded by the convex ribs to form a closed surface; and the concave surfaces are coated with a non-stick coating.

[0008] As a preferred technical solution, the width of the convex rib is set to 0.3-1.0 mm.

[0009] As a preferred technical solution, the depth of the concave surface relative to the convex rib is set to 0.05-0.1 mm.

[0010] As a preferred technical solution, the shape of the concave surface is set to be a hexagon, a quadrilateral or a triangle; the length of each side of the concave surface is set to 1-30 mm, and the length of the convex rib matches the length of the side of the concave surface.

[0011] As a preferred technical solution, the thickness of the non-stick coating is set to 0.03-0.07 mm;

[0012] and / or, the surface of the rib is also coated with the non-stick coating;

[0013] And / or, the non-stick coating is Teflon.

[0014] In a second aspect, the present invention provides a processing method for processing the aforementioned scratch-resistant tire mold, comprising the following steps:

[0015] S1: sandblasting the cavity surface of the side plate;

[0016] S2: Carve a texture on the cavity surface using a laser engraving machine;

[0017] S3: placing the side plate into a sintering furnace for heating, degreasing and degreasing, and cooling;

[0018] S4: applying a non-stick coating base layer at the texture;

[0019] S5: placing the side plate into the sintering furnace for heating and drying, and cooling;

[0020] S6: applying a non-stick coating surface layer at the texture;

[0021] S7: placing the side plate into the sintering furnace for heating and drying, and cooling to room temperature.

[0022] As a preferred technical solution, in step S1, the blasting material for the sandblasting treatment is set to glass beads, and the particle size of the glass beads is set to 100-300 meshes.

[0023] As a preferred technical solution, in step S2, the power of the laser engraving machine during engraving is set to 40-90W, the scanning speed is set to 700-1500mm / s, and the frequency is set to 100-150KHZ.

[0024] As a preferred technical solution, in step S3, the temperature in the sintering furnace is set to 390°C and kept warm for 30 minutes; the side plate is taken out when the sintering furnace cools to 200°C and is cooled to 38-45°C;

[0025] and / or, in step S5, the temperature in the sintering furnace is set to 140-150° C., the drying time is 20-30 min, and the mixture is cooled to 38-44° C.;

[0026] And / or, in step S7, the temperature in the sintering furnace is set to 370-390°C, the drying time is 20-30min, and the side plate is taken out and left to cool when the sintering furnace cools to 200°C.

[0027] As a preferred technical solution, in step S4 and step S6, the coating method is set to air spraying, and the speed of the air spraying is set to 2-10 mm / s;

[0028] And / or, in step S4, the thickness of the bottom layer of the non-stick coating is set to 0.01-0.02 mm.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The scratch-resistant tire mold provided by the present invention is provided with a texture on the cavity surface corresponding to the tire sidewall position, the texture is composed of a concave surface and a convex rib, and the concave surface is surrounded by the convex rib; during the vulcanization process, when the information plate flows with the tire blank rubber material, the convex rib can prevent the information plate from contacting the concave surface, which can not only effectively protect the non-stick coating on the concave surface and ensure the non-stickiness of the cavity surface, but also will not leave continuous long scratches on the cavity surface, thereby improving the scratch resistance of the cavity surface, thereby at least doubling the service life of the tire mold.

[0031] 2. After the tire is vulcanized using the present invention, the texture formed by the concave surface and the convex ribs can be retained on the surface of the tire sidewall. The texture can become a distinctive mark of the tire, enhancing the aesthetics of the tire, which can not only improve the recognition of the tire, but also improve the brand effect of the tire.

[0032] 3. The processing method provided by the present invention can make the morphology of the texture on the cavity surface meet the precision requirements and can ensure that the thickness of the non-stick coating on the cavity surface is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the texture in the first embodiment of a scratch-resistant tire mold of the present invention;

[0034] Figure 2 for Figure 1 Sectional view along AA direction;

[0035] Figure 3 It is a schematic structural diagram of the texture in the second embodiment of a scratch-resistant tire mold of the present invention;

[0036] Figure 4It is a structural schematic diagram of the texture in the third embodiment of a scratch-resistant tire mold of the present invention;

[0037] Figure 5 This is the electron microscope image of Comparative Example 4 before scratching;

[0038] Figure 6 This is the electron microscope image of Comparative Example 4 after scratching;

[0039] Figure 7 This is the electron microscope image of Comparative Example 1 after scratching;

[0040] Figure 8 This is the electron microscope image of Comparative Example 2 after scratching;

[0041] Fig. 9 This is the electron microscope image of Comparative Example 3 after scratching.

[0042] In the figure: 1-concave surface, 2-convex ribs, 3-non-stick coating. DETAILED DESCRIPTION

[0043] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings. Embodiment 1

[0044] First, please refer to Figure 1 and Figure 2 The present invention provides a scratch-resistant tire mold, wherein a cavity surface corresponding to the tire sidewall position is arranged on a side plate, and the cavity surface has a texture, the texture includes a plurality of orderly arranged concave surfaces 1, and convex ribs 2 are arranged between adjacent concave surfaces 1; the concave surface 1 is surrounded by the convex ribs 2 to form a closed surface, and a non-stick coating 3 is coated on the concave surface 1. On the one hand, the thin strip-shaped convex ribs 2 are distributed at the periphery of the concave surface 1, and the information plate can only contact the surface of the convex ribs 2, and will not leave continuous long strip-shaped scratches on the cavity surface, thereby improving the scratch resistance of the cavity surface and thus improving the service life of the tire mold; on the other hand, the convex ribs 2 can prevent the information plate from contacting the concave surface 1, and can effectively protect the non-stick coating 3 on the concave surface 1, thereby ensuring the non-stickiness and vulcanization quality of the non-stick coating 3.

[0045] For details, please refer to Figure 2 The width b of the protruding surface of the rib 2 is preferably set to 0.3-1.0 mm, which can ensure the structural strength of the rib 2 while reducing the protruding surface area of ​​the rib 2 as much as possible; at the same time, the depth a of the concave surface 1 relative to the rib 2 is preferably set to 0.05-0.1 mm, which can ensure that the information plate cannot contact the concave surface 1 while avoiding the pattern depth of the tire sidewall surface being too large, thereby ensuring the vulcanization effect of the tire sidewall surface.

[0046] In this embodiment, please refer to Figure 1 and Figure 2The shape of the concave surface 1 is set to a regular hexagon, so that the texture is honeycomb-shaped; the length of each section of the convex rib 2 matches the side length of the concave surface 1, and the length d of each side of the concave surface 1 is preferably set to 1-30mm, and more preferably, the length d of each side of the concave surface 1 is set to 5-10mm, which can ensure that the area size of the concave surface 1 matches the depth of the concave surface 1, and the information board will not easily scratch the non-stick coating 3 on the concave surface 1 due to the concave surface 1 being too large, nor will the surface of the convex rib 2 occupy too much of the cavity surface due to the concave surface 1 being too small, and the protection effect on the cavity surface is too small; in other embodiments, the shape of each concave surface 1 may not be exactly the same, and the shape of the concave surface 1 may also be a hexagon of other shapes, so as to be able to be arranged in an orderly manner on the cavity surface.

[0047] For further information, please refer to Figure 2 The thickness c of the non-stick coating 3 is preferably set to 0.03-0.07 mm, which can ensure durability and non-stick effect; specifically, the material of the non-stick coating 3 is preferably set to Teflon; further, when the non-stick coating 3 is applied, the non-stick coating 3 will also be applied to the surface of the rib 2. When the information plate contacts the surface of the rib 2, although the non-stick coating 3 on the surface of the rib 2 will be damaged, it will not leave continuous long scratches on the cavity surface, and will not affect the vulcanization effect of the tire sidewall surface.

[0048] In a second aspect, the present invention provides a processing method for processing the aforementioned scratch-resistant tire mold, comprising the following steps:

[0049] S1: sandblasting the cavity surface of the side plate;

[0050] Specifically, the blasting material for sandblasting is preferably glass beads, and the particle size of the glass beads is preferably 100-300 meshes, which can make the cleanliness and roughness of the cavity surface meet the requirements, improve the mechanical properties of the cavity surface, improve the fatigue resistance of the cavity surface, increase the adhesion between the cavity surface and the non-stick coating, extend the durability of the non-stick coating, and also facilitate the leveling and decoration of the non-stick coating;

[0051] S2: Input the texture program to be engraved into the laser engraving machine, and use the laser engraving machine to engrave the texture on the cavity surface;

[0052] Specifically, the power of the laser engraving machine during engraving is set to 40-90W, the scanning speed is set to 700-1500mm / s, and the frequency is set to 100-150KHZ, which can accurately engrave a honeycomb texture with a convex rib 2 width of 0.3-1.0mm, a concave surface 1 side length of 1-30mm, and a depth of 0.05-0.1mm at the concave surface 1;

[0053] S3: placing the side plate into a sintering furnace for heating, degreasing and degreasing, and cooling;

[0054] Specifically, the temperature in the sintering furnace is set to 390°C and kept warm for 30 minutes; the side plate is taken out when the sintering furnace cools to 200°C and cooled to 38-45°C. Degreasing and degreasing can prevent interference with chemical reactions, improve the adhesion between the non-stick coating and the cavity surface, and improve the quality of the non-stick coating;

[0055] S4: Apply a non-stick coating base layer to the texture;

[0056] Specifically, the coating method is set to air spraying, and the air spraying speed is set to 2-10 mm / s, forming a non-stick coating bottom layer with a thickness of 0.01-0.02 mm on the texture;

[0057] S5: placing the side plate into a sintering furnace for heating and drying, and then cooling;

[0058] Specifically, the temperature in the sintering furnace is set to 140-150°C, the drying time is 20-30 minutes, and the mixture is cooled to 38-44°C;

[0059] S6: Apply a non-stick coating surface layer to the texture;

[0060] Specifically, the coating method is set to air spraying, the air spraying speed is set to 2-10 mm / s, a non-stick coating surface layer is formed on the texture, and the total thickness of the non-stick coating bottom layer and the non-stick coating surface layer reaches 0.03-0.07 mm. The non-stick coating formed by the non-stick coating bottom layer and the non-stick coating surface layer can effectively extend the durability of the non-stick coating and improve the quality of the non-stick coating;

[0061] S7: placing the side plate in a sintering furnace for heating and drying, and cooling to room temperature;

[0062] Specifically, the temperature in the sintering furnace is set to 370-390°C, the drying time is 20-30min, and the side plate is taken out and left to cool when the sintering furnace cools to 200°C.

[0063] Comparative Example 1

[0064] In the texture program to be engraved, the depth of the concave surface 1 relative to the convex rib 2 is set to 0.02 mm, and the cavity surface is laser engraved.

[0065] Comparative Example 2

[0066] In the texture program to be engraved, the depth of the concave surface 1 relative to the convex rib 2 is set to 0.05 mm, and the cavity surface is laser engraved.

[0067] Comparative Example 3

[0068] In the texture program to be engraved, the depth of the concave surface 1 relative to the convex rib 2 is set to 0.1 mm, and the cavity surface is laser engraved.

[0069] Comparative Example 4

[0070] There is no texture on the cavity surface, it is a traditional smooth surface.

[0071] Comparative Examples 1-4 are compared, and the specific comparison method is as follows:

[0072] 1. The morphology of Comparative Examples 1-3 after laser engraving was examined using a laser scanning confocal microscope, the contour map was analyzed using analysis software, and the depth of the concave surface 1 was measured. The depth results are shown in Table 1;

[0073] 2. Comparative Examples 1-4 were all sprayed with a non-stick coating 3, and the morphology of Comparative Examples 1-3 after spraying the non-stick coating 3 was examined using a laser scanning confocal microscope, and the contour map was analyzed using analysis software, and the depth of the concave surface 1 was measured. The depth results are shown in Table 1;

[0074] 3. Using the aluminum information plate, scratch each of Comparative Examples 1-4 500 times;

[0075] 4. The morphology of Comparative Examples 1-4 after scratching was examined using a laser scanning confocal microscope, the contour map was analyzed using analysis software, and the depth of the concave surface 1 in Comparative Examples 1-3 was measured. The depth results are shown in Table 1;

[0076] 5. Using a scanning electron microscope (SEM) to examine the microscopic morphology and composition analysis of the non-stick coating 3 of Comparative Examples 1-4 after scratching;

[0077] 6. Comparative Examples 1-4 were respectively installed on the mold of a flat vulcanizing machine to carry out vulcanization experiments.

[0078] Table 1

[0079]

[0080] According to Table 1 and the test results, in the second step of the comparison method, after the non-stick coating 3 is sprayed on the comparative examples 1-3, the non-stick coating 3 is uniformly coated on the concave surface 1 and the convex rib 2, and the depth of the concave surface 1 does not change substantially;

[0081] In the third step of the comparison method, the color of the convex rib 2 in Comparative Examples 1-3 becomes lighter and presents a metallic color, while the concave surface 1 still retains the original color after the non-stick coating 3 is sprayed; the non-stick coating 3 on the cavity surface in Comparative Example 4 has visible scratches;

[0082] In the fourth step of the comparison method, after being scratched, the convex rib 2 of the texture of Comparative Examples 1-3 was worn, resulting in a certain degree of reduction in the depth of the concave surface 1 of the texture, but the non-stick coating 3 at the concave surface 1 still retained its original morphology and was still able to ensure the non-stick performance; after being scratched, Comparative Example 4 had serious scratches on its cavity surface;

[0083] In step 5 of the comparison method, please refer to Figure 5-Figure 9 , due to the low depth of the concave surface 1, the non-stick coating 3 at the concave surface 1 in Comparative Example 1 has slight scratches; the non-stick coating 3 at the concave surface 1 in Comparative Examples 2 and 3 still retains the original morphology and is not scratched; the convex rib 2 of Comparative Examples 1-3 is severely scratched, and part of the aluminum element is exposed at the convex rib 2, but part of the non-stick coating 3 is still retained; the non-stick coating 3 on the cavity surface in Comparative Example 4 has continuous long scratches, and the substrate is exposed, and the film-forming property of the non-stick coating 3 is damaged;

[0084] In the sixth step of the comparison method, the surfaces of the vulcanized rubber blocks of Comparative Examples 1-3 all retain textures, and the deeper the concave surface 1 is, the more obvious the textures on the surface of the vulcanized rubber block are, which can enhance the aesthetics. Embodiment 2

[0085] Please refer to Figure 3 The main difference between this embodiment and the first embodiment is that the shape of the concave surface 1 is a square; in other embodiments, the shape of the concave surface 1 may also be a rectangle, so as to be able to be arranged in an orderly manner on the cavity surface. Embodiment 3

[0086] Please refer to Figure 4 The main difference between this embodiment and the first embodiment is that the shape of the concave surface 1 is an equilateral triangle; in other embodiments, the shape of the concave surface 1 can also be a triangle of other shapes, so long as they can be arranged in an orderly manner on the cavity surface.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A scratch-resistant tire mold, characterized in that: The invention comprises a side plate, wherein the side plate has a cavity surface, the cavity surface has a texture, the texture comprises a plurality of orderly arranged concave surfaces (1), and convex ribs (2) are arranged between adjacent concave surfaces (1); the concave surface (1) is surrounded by the convex ribs (2) to form a closed surface; the concave surface (1) is coated with a non-stick coating (3); the width of the convex ribs (2) is set to 0.3-1.0 mm; the depth of the concave surface (1) relative to the convex ribs (2) is set to 0.05-0.1 mm; When the tire is vulcanized, the information plate is placed on the cavity surface corresponding to the tire sidewall; during the vulcanization process, when the information plate flows with the tire blank rubber material, the convex rib (2) can prevent the information plate from contacting the concave surface (1).

2. The scratch-resistant tire mold according to claim 1, characterized in that: The shape of the concave surface (1) is set to be a hexagon, a quadrilateral or a triangle; the length of each side of the concave surface (1) is set to be 1-30 mm, and the length of the convex rib (2) matches the length of the side of the concave surface (1).

3. The scratch-resistant tire mold according to claim 1, characterized in that: The thickness of the non-stick coating (3) is set to 0.03-0.07 mm; and / or, the surface of the rib (2) is also coated with the non-stick coating (3); And / or, the non-stick coating (3) is made of Teflon.

4. A processing method for processing a scratch-resistant tire mold as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1: sandblasting the cavity surface of the side plate; S2: Carve a texture on the cavity surface using a laser engraving machine; S3: placing the side plate into a sintering furnace for heating, degreasing and degreasing, and cooling; S4: applying a non-stick coating base layer at the texture; S5: placing the side plate into the sintering furnace for heating and drying, and cooling; S6: applying a non-stick coating surface layer at the texture; S7: placing the side plate into the sintering furnace for heating and drying, and cooling to room temperature.

5. A processing method according to claim 4, characterized in that: In step S1, the blasting material for the sandblasting treatment is set to glass beads, and the particle size of the glass beads is set to 100-300 meshes.

6. A processing method according to claim 4, characterized in that: In step S2, the power of the laser engraving machine during engraving is set to 40-90W, the scanning speed is set to 700-1500mm / s, and the frequency is set to 100-150KHZ.

7. A processing method according to claim 4, characterized in that: In step S3, the temperature in the sintering furnace is set to 390°C and kept at this temperature for 30 minutes; the side plate is taken out when the sintering furnace cools to 200°C and is cooled to 38-45°C; and / or, in step S5, the temperature in the sintering furnace is set to 140-150° C., the drying time is 20-30 min, and the mixture is cooled to 38-44° C.; And / or, in step S7, the temperature in the sintering furnace is set to 370-390°C, the drying time is 20-30min, and the side plate is taken out and left to cool when the sintering furnace cools to 200°C.

8. A processing method according to claim 4, characterized in that: In step S4 and step S6, the coating method is set to air spraying, and the speed of the air spraying is set to 2-10 mm / s; And / or, in step S4, the thickness of the bottom layer of the non-stick coating is set to 0.01-0.02 mm.

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