Die for producing flash-free inner hole of rubber part

Abstract

The utility model discloses a die for producing a flash-free inner hole of a rubber part, which comprises an upper die, a lower die and a sealing part, an upper groove is arranged on the lower end face of the upper die, a lower groove is arranged on the upper end face of the lower die at a position corresponding to the upper groove, and the sealing part is arranged on the upper end face of the lower die. The shape of a space defined by the upper groove and the lower groove corresponds to the shape of an inner hole to be machined, and the space defined by the upper groove and the lower groove is used for containing the sealing piece. The sealing piece is arranged in the space between the upper groove and the lower groove which are formed in the upper die and the lower die respectively, and the sealing piece can block flowing of product rubber in the die assembly forming process, so that the effect that an inner hole is free of flash is achieved, and the production efficiency and the rubber material utilization rate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber moulds, in particular to a mould for producing a flash-free inner hole of a rubber piece. Background Art

[0002] At present, due to the wide variety of rubber products, the structural characteristics of most rubber products have different numbers of through holes. In order to realize the through holes on the rubber parts, they are generally processed through the mold structure and the injection molding process is adopted. The existing mold structure has an error in the height of the inner hole core. The error in the height of the core causes the inner hole flash during the production process, which needs to be manually removed after production, resulting in low production efficiency and low rubber material utilization. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model provides a mold for producing a flash-free inner hole of a rubber part.

[0004] The utility model proposes a mold for producing flash-free inner holes of rubber parts, comprising an upper mold and a lower mold, and is characterized in that a sealing member is also provided, an upper groove is provided on the lower end surface of the upper mold, and a lower groove is provided at a position of the upper end surface of the lower mold corresponding to the upper groove, the shape of the space enclosed by the upper groove and the lower groove corresponds to the shape of the inner hole to be processed, and the space enclosed by the upper groove and the lower groove is used to accommodate the sealing member.

[0005] Preferably, the sealing member is a fluororubber member, and after vulcanization, the fluororubber member forms a fluoro sealing ring in the shape of an inner hole in the space between the upper groove and the lower groove.

[0006] Preferably, an adhesive is coated inside the upper groove, and the adhesive bonds the sealing member inside the upper groove.

[0007] Preferably, the fluorine sealing ring comprises a transverse plate and three convex columns, and the three convex columns are arranged on the transverse plate and are spaced apart and distributed along the length direction thereof.

[0008] Preferably, both ends of the transverse plate are provided with protrusions.

[0009] In summary, the utility model has the following beneficial effects: by providing a seal in the space between the upper groove and the lower groove respectively opened in the upper mold and the lower mold, the seal can block the flow of product rubber during the mold closing and molding process, thereby achieving a flash-free effect on the inner hole, thereby improving production efficiency and rubber utilization.

[0010] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partial cross-sectional view of a mold for producing a flash-free inner hole of a rubber part according to an embodiment of the utility model;

[0012] Figure 2 This is a schematic structural diagram of a fluorine sealing ring according to one embodiment of the present invention.

[0013] In the figure:

[0014] 1. Upper die; 2. Lower die; 3. Fluorine sealing ring; 4. Horizontal plate; 5. Boss; 6. Protrusion. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0016] like Figure 1-2 As shown, the present embodiment proposes a mold for producing a flash-free inner hole of a rubber part, comprising an upper mold 1 and a lower mold 2, and a sealing member, wherein an upper groove is provided on the lower end surface of the upper mold 1, and a lower groove is provided at a position corresponding to the upper groove on the upper end surface of the lower mold 2, wherein the shape of the space enclosed between the upper groove and the lower groove corresponds to the shape of the inner hole to be processed, and the space enclosed between the upper groove and the lower groove is used to accommodate the sealing member. The upper groove and the lower groove are not limited to specific sizes and shapes, and are designed according to the specific shape and requirements of the product.

[0017] In this way, during the mold closing and molding process, the seal can block the flow of product rubber, thereby achieving a flash-free effect on the inner hole, improving production efficiency and rubber utilization.

[0018] Furthermore, the sealing member is a fluororubber member, and after the fluororubber member is vulcanized, a fluoro sealing ring 3 in the shape of an inner hole is formed in the space between the upper groove and the lower groove. Specifically, an unvulcanized fluororubber member is placed in advance in the space between the upper groove and the lower groove, and the fluoro sealing ring 3 in the shape of an inner hole is formed in the space between the upper groove and the lower groove by high temperature molding.

[0019] Taking advantage of the high temperature resistance of fluororubber parts, fluoro sealing rings can withstand temperatures up to 300°C and are suitable for long-term work in an environment of 200°C to 250°C. The vulcanization temperature of rubber molds is between 120°C and 180°C. Resistant to chemical corrosion, it has strong resistance to a variety of chemical substances, such as acids, alkalis, and organic solvents.

[0020] During the mold closing and molding process, the fluorine sealing ring 3 can block the flow of product rubber, thereby achieving a flash-free effect on the inner hole.

[0021] Furthermore, the upper groove is coated with an adhesive of a specific concentration, and the adhesive bonds the seal to the inside of the upper groove. This allows the fluorine sealing ring 3 to fit firmly inside the upper groove, and the product demoulding process does not cause it to fall off. At the same time, when the fluorine sealing ring 3 fails, it can be manually torn off (in order to facilitate the removal of the fluorine sealing ring, the concentration of the adhesive can be set to a low concentration, which can both bond the fluorine sealing ring to prevent it from falling off and facilitate the removal of the fluorine sealing ring). After one production is completed, the product is taken out, and the fluorine sealing ring 3 continues to exist in the upper groove, and the next production continues.

[0022] It should be noted that the material of the specific adhesive can refer to existing adhesives, as long as it can bond the fluorine sealing ring. The specific situation depends on the material, and this article will not repeat it.

[0023] like Figure 2 As shown, in one specific embodiment, the fluorine sealing ring 3 includes a transverse plate 4 and three protrusions 5, and the three protrusions 5 are arranged on the transverse plate 4 and spaced apart along the length direction thereof. Both ends of the transverse plate 4 are provided with protrusions 6.

[0024] Of course, in other embodiments, the shape of the fluorine sealing ring 3 may be other shapes, which may be specifically determined according to the shape and requirements of the product.

[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mold for producing a flash-free inner hole of a rubber part, comprising an upper mold and a lower mold, characterized in that: A sealing member is also provided. An upper groove is provided on the lower end surface of the upper mold, and a lower groove is provided at the upper end surface of the lower mold at a position corresponding to the upper groove. The shape of the space enclosed by the upper groove and the lower groove corresponds to the shape of the inner hole to be processed, and the space enclosed by the upper groove and the lower groove is used to accommodate the sealing member.

2. The mold for producing a flash-free inner hole of a rubber part according to claim 1, characterized in that: The sealing member is a fluororubber member, and after vulcanization, the fluororubber member forms a fluoro sealing ring in the shape of an inner hole in the space between the upper groove and the lower groove.

3. The mold for producing a flash-free inner hole of a rubber part according to claim 1, characterized in that: An adhesive is coated inside the upper groove, and the adhesive bonds the sealing member to the inside of the upper groove.

4. The mold for producing a flash-free inner hole of a rubber part according to claim 2, characterized in that: The fluorine sealing ring comprises a transverse plate and three convex columns. The three convex columns are arranged on the transverse plate and are spaced and distributed along the length direction thereof.

5. The mold for producing a flash-free inner hole of a rubber part according to claim 4, characterized in that: Both ends of the transverse plate are provided with protrusions.

Images