Vulcanizing mold of rubber wheel

Abstract

A lower die cavity of a lower-layer die and an upper die cavity of an upper-layer die are in butt joint to form a die cavity, an annular groove is formed in the outer edge of a butt joint opening of the lower die cavity, and the annular groove and the upper end face of the lower-layer die are in a step shape. An annular glue injection opening communicated with the mold cavity is formed in the outer edge of a butt joint opening of the annular groove and the upper mold cavity, a plurality of branch glue injection grooves are formed in the end face of the annular groove, a mold body of the upper-layer mold is provided with a plurality of glue injection runners corresponding to the branch glue injection grooves, the glue injection runners are in butt joint with the corresponding branch glue injection grooves, and a main glue injection opening is formed in the center of the upper end of the upper-layer mold. And a plurality of runner grooves radiating towards the periphery by taking the main glue injection port as the center are communicated with the glue injection runners. According to the utility model, a rubber material enters the annular groove, is annularly diffused and is uniformly injected into the mold cavity from the radial direction of the roller framework, so that the rubber material is uniformly formed and enters the mold cavity in the radial direction, shear type impact is avoided, the stripping resistance of a product is improved, and rubber failure is not easy to occur.

Description

Technical Field

[0001] This utility model relates to the field of rubber vulcanization mold technology, specifically to a vulcanization mold for a rubber wheel. Background Technology

[0002] Rubber wheel vulcanizing molds mainly consist of an upper mold and a lower mold, which combine to form a mold cavity. A point-diffusion injection method is typically used for injection, where an injection port is opened on the end face of the upper mold, with several flow channels radiating outwards from this port, each channel leading radially into the mold cavity. This structure has two drawbacks: First, the point-diffusion method results in a stiffness difference between the injection port and non-injection port areas, with the injection port area being harder and other areas softer, significantly impacting the product's usability and lifespan. Second, with the injection port located on the side of the roller, the roller frame is typically coated with adhesive beforehand. Side-injected adhesive enters the mold along the frame's cut surface, peeling and eroding the adhesive, affecting the product's bonding strength and making it prone to delamination. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a vulcanization mold for a rubber wheel, which adopts an annular diffusion radial glue injection structure, ensuring uniform glue injection and impacting the frame from the front.

[0004] To achieve the above objectives, the following technical solution is adopted: a vulcanizing mold for a rubber wheel, comprising an upper mold and a lower mold, wherein the lower mold cavity of the lower mold and the upper mold cavity of the upper mold are joined to form a mold cavity; an annular groove is provided on the outer edge of the interface of the lower mold cavity; the annular groove and the upper end face of the lower mold are stepped; an annular injection port communicating with the mold cavity is formed on the outer edge of the interface of the annular groove and the upper mold cavity; and several branch injection grooves are provided on the end face of the annular groove, which are evenly distributed on the end face of the annular groove.

[0005] The upper mold body is provided with several injection channels corresponding to the branch injection grooves. The injection channels are connected to the corresponding branch injection grooves. The upper center of the upper mold is provided with a main injection port, and several flow channel grooves radiating outward from the main injection port are connected to each injection channel.

[0006] Furthermore, the depth of the annular groove is 1-3 mm, and the width of the annular groove is 10-15 mm.

[0007] Furthermore, a central shaft positioning groove is provided in the center of the lower mold cavity of the lower mold, and a skeleton positioning shaft for fixing the rubber wheel skeleton is installed in the central shaft positioning groove.

[0008] Furthermore, the upper mold body is provided with positioning holes, and the upper end face of the lower mold is provided with positioning pins. The upper mold and the lower mold are assembled into one unit through the positioning holes and positioning pins.

[0009] Furthermore, mold clamping plates for mold separation clamping are provided on both sides of the mold body of the upper mold and the lower mold.

[0010] The beneficial effects of this utility model are as follows: An annular groove is provided on the outer edge of the lower mold cavity, forming an annular injection port with the outer edge of the interface of the upper mold cavity. A branch injection groove is provided on the end face of the annular groove to connect with the injection channel of the upper mold. This structure allows the adhesive to enter the annular groove and diffuse in an annular manner, and is evenly injected into the mold cavity from the radial direction of the roller frame. This not only makes the adhesive uniformly formed, but also provides a frontal impact on the adhesive on the roller frame, avoiding shearing impact and ensuring the integrity of the adhesive. This improves the product's anti-peeling ability and makes it less prone to delamination. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a top view of the present invention;

[0013] Figure 3 This is a view of the present invention from direction AA;

[0014] Figure 4 for Figure 3 Enlarged view of point A;

[0015] Figure 5 This is a schematic diagram of the lower mold structure;

[0016] Figure 6 This is a schematic diagram illustrating the application of this utility model;

[0017] Figure 7 This is a schematic diagram of the present invention in the glue-filling state.

[0018] As shown in the figure:

[0019] 1. Upper mold; 100. Positioning hole; 101. Injection channel; 102. Main injection port; 103. Runner groove;

[0020] 2. Lower mold layer; 200. Positioning pin; 201. Annular groove; 202. Branch injection groove;

[0021] 3. Skeleton positioning axis;

[0022] 4. Mold clamping plate;

[0023] 800, Roller frame; 801, Injection strip; 900, Mold cavity; 901, Annular injection port. Detailed Implementation

[0024] Example 1

[0025] The following description, in conjunction with the accompanying drawings, further illustrates the points, such as... Figure 1-4 As shown, a vulcanizing mold for a rubber wheel is provided, comprising an upper mold 1 and a lower mold 2.

[0026] The lower mold 2 includes a lower mold cavity. The interface of the lower mold cavity is located on the upper end face of the lower mold 2. A central shaft positioning groove is provided in the center of the lower mold cavity. A frame positioning shaft 3 for fixing the rubber roller frame is installed in the central shaft positioning groove to prevent the rubber roller frame from shifting due to the impact of the rubber material during the injection process. The upper end face of the lower mold 2 is provided with a positioning post 200 for cooperating with the upper mold 1. An annular groove 201 is provided on the outer edge of the interface of the lower mold cavity 2. The annular groove 201 is stepped with the upper end face of the lower mold 2. The depth of the annular groove 201 is 1-3mm and the width of the annular groove is 10-15mm. Several branch injection grooves 202 are provided on the end face of the annular groove 201. The several branch injection grooves 202 are evenly distributed on the end face of the annular groove 201.

[0027] The upper mold 1 includes an upper mold cavity, the interface of which is located on the lower end face of the upper mold 1. The mold body of the upper mold 1 is provided with a positioning hole 100. The mold body of the upper mold 1 is provided with a plurality of injection channels 101 corresponding to the branch injection grooves 202. The upper end center of the upper mold 1 is provided with a main injection port 102, and a plurality of flow channel grooves 103 radiating outward from the main injection port 102 are provided and connected to each injection channel 101.

[0028] like Figure 7 In the vulcanizing mold shown in this example, when the mold is in the injection state, the upper mold 1 and the lower mold 2 are assembled into one piece by the positioning hole 100 and the positioning post 200. The outer edge of the interface between the annular groove 201 and the upper mold cavity forms an annular injection port 901 that communicates with the mold cavity 900. Each injection channel 101 is connected to the corresponding branch injection groove 202. This example demonstrates the application of a glue injection machine. Mold clamping plates 4 for mold separation are installed on both sides of the mold body of the upper mold 1 and the lower mold 2. The glue injection machine injects glue from the main injection port 102. The glue flows from the main injection port 102 through various runner channels 103 to the injection channels 101. The glue is then injected from each injection channel 101 into each branch injection channel 202. From the branch injection channels 202, the glue diffuses into the annular groove 201, and finally enters the mold cavity 900 from the annular injection port 901. This structure greatly widens the direct entry point of the glue into the mold cavity 900, and allows it to enter the mold cavity 900 radially. This not only makes the glue molding more uniform but also avoids shearing erosion of the adhesive on the roller frame 800. The molded roller product is as follows: Figure 6 As shown, due to the annular groove 201, a molten material strip 801 is formed around the roller product 800. The molten material strip 801 needs to be cut off in the final product.

[0029] This utility model is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this utility model shall be included in the protection scope of this utility model.

Claims

1. A vulcanizing mold for a rubber wheel, comprising an upper mold (1) and a lower mold (2), characterized in that, The lower mold cavity of the lower mold (2) and the upper mold cavity of the upper mold (1) are joined to form a mold cavity (900). An annular groove (201) is provided on the outer edge of the interface of the lower mold cavity. The annular groove (201) and the upper end face of the lower mold (2) are stepped. The annular groove (201) and the outer edge of the interface of the upper mold cavity form an annular injection port (901) that communicates with the mold cavity (900). The end face of the annular groove (201) is provided with several branch injection grooves (202). The several branch injection grooves (202) are evenly distributed on the end face of the annular groove (201). The upper mold (1) has a number of injection channels (101) corresponding to the branch injection grooves (202). The injection channels (101) are connected to the corresponding branch injection grooves (202). The upper end of the upper mold (1) has a main injection port (102) at its center, and a number of flow channel grooves (103) radiating outward from the main injection port (102) are connected to each injection channel (101).

2. The vulcanizing mold according to claim 1, characterized in that, The depth of the annular groove (201) is 1-3 mm, and the width of the annular groove (201) is 10-15 mm.

3. The vulcanizing mold according to claim 2, characterized in that, The lower mold (2) has a central shaft positioning groove in the center of the lower mold cavity, and a skeleton positioning shaft (3) for fixing the rubber wheel skeleton is installed in the central shaft positioning groove.

4. The vulcanizing mold according to claim 3, characterized in that, The upper mold (1) has a positioning hole (100) on its mold body, and the lower mold (2) has a positioning post (200) on its upper end face. The upper mold (1) and the lower mold (2) are assembled into one unit by the positioning hole (100) and the positioning post (200).

5. The vulcanizing mold according to claim 2, characterized in that, Both sides of the upper mold (1) and the lower mold (2) are provided with mold clamping plates (4) for mold separation clamping.

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