O-shaped ring machining die

Abstract

The utility model discloses an O-shaped ring processing die which comprises an upper die and a lower die, an upper forming groove is formed in the upper die, a lower forming groove is formed in the lower die, the lower forming groove and the upper forming groove form a forming cavity, a protruding part protruding out of the upper surface of the lower die is arranged on the lower die, and the protruding part is arranged on the upper surface of the lower die. The protruding part is used for limiting the side face of the ring-shaped preformed piece, a containing groove used for containing the protruding part is formed in the upper surface of the upper die, and it needs to be indicated that the protruding part can be one protruding piece or a plurality of protruding pieces. The outer side or the inner side of the ring-shaped preformed part is limited by one or more parts, so that the preformed part is limited, movement of the preformed part in the machining process is avoided, and the machining efficiency and the forming effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber ring processing molds, in particular to an O-ring processing mold. Background Art

[0002] Existing O-ring processing molds such as Figure 1 As shown, it includes an upper mold 1 and a lower mold 2. The lower bottom surface of the upper mold 1 is provided with an upper molding groove, and the upper surface of the lower mold 2 is provided with a lower molding groove. The upper molding groove and the lower molding groove form a cavity, and the upper surface of the lower mold 2 is a plane. In the process of processing O-rings with an inner diameter of φ35mm-φ400mm, it is easy to deform the ring-shaped preform during feeding, which easily leads to product shortage. The usual practice is to increase the unit consumption to compensate for the deformation of the preform and provide tolerance for the rubber filling the cavity, so as to solve or optimize this problem. However, for rubber types that are more sensitive to unit consumption, such as rubber types with poor fluidity and high hardness, it is necessary to increase the unit consumption of large gram weight to optimize the shortage problem, but it brings new problems. The combined flash thickness of the O-ring product is greatly increased, resulting in abnormal combined flash size.

[0003] Therefore, it is urgent to provide a mold that can fix the ring-shaped preform of the O-ring to realize the mold of the material. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model provides an O-ring processing mold.

[0005] The utility model proposes an O-ring processing mold, which is used to process a ring-shaped preformed part into an O-ring, and comprises an upper mold and a lower mold, wherein the upper mold is provided with an upper molding groove, and the lower mold is provided with a lower molding groove, wherein the lower molding groove and the upper molding groove form a molding cavity, and the lower mold is provided with a protrusion protruding from the upper surface of the lower mold, wherein the protrusion is used to limit the side surface of the ring-shaped preformed part, and the upper surface of the upper mold is provided with an accommodating groove for accommodating the protrusion. It should be noted that the protrusion can be one protrusion or multiple protrusions, and one or more parts form a limit with the outer side or inner side of the ring-shaped preformed part to achieve the limit of the preformed part, thereby avoiding the movement of the preformed part during the processing and thus increasing the processing efficiency and the molding effect.

[0006] Preferably, when the bottom surface of the accommodating groove contacts the upper surface of the protruding portion, a molding cavity is formed between the upper molding groove and the lower molding groove.

[0007] Preferably, the lower molding groove is located on the outside of the protrusion, that is, during processing, the side of the receiving groove of the upper mold squeezes the preform outward to complete the molding, which is convenient for positioning the preform on the one hand, and increases the processing quality of the O-ring on the other hand.

[0008] As in the prior art, in order to facilitate the accommodation of waste materials, a lower tearing edge groove is opened on the lower die.

[0009] In order to facilitate the positioning of the ring-shaped preform, preferably, the outer side surface of the protrusion is a cylindrical surface, and the ring-shaped preform is sleeved on the outer side of the protrusion during processing. Preferably, the cylindrical surface is coaxial with the lower molding groove.

[0010] In order to further improve the processing quality of the O-ring, preferably, a vent hole is opened on the upper mold, the vent hole is communicated with the accommodating groove, and a heat conduction hole is opened on the protruding portion, and the heat conduction hole is communicated with the vent hole.

[0011] In order to further improve the processing quality of the O-ring, preferably, the diameter of the heat conduction hole is larger than the diameter of the exhaust hole.

[0012] In order to further improve the processing quality of the O-ring, preferably, the heat conducting hole has a portion extending to the lower mold, and the depth of the heat conducting hole extending to the lower mold portion is greater than the depth of the lower molding groove.

[0013] In order to facilitate the installation of the protruding portion, preferably, a mounting groove is opened on the lower mold, and the protruding portion is installed in the mounting groove.

[0014] It should be noted that the above technical solution is described for the case of a single-layer mold. For a double-layer mold including an upper mold, a lower mold and a middle mold, in order to realize two cavities distributed and opposite to each other in the vertical direction so as to facilitate the limitation of the ring-shaped preform, the structure of the lower half of the middle mold is the same as that of the lower half of the upper mold, and the structure of the upper half of the middle mold is the same as that of the upper half of the lower mold.

[0015] In the utility model, the proposed O-ring processing mold, after optimizing the mold structure, fixes the moving position of the preformed part, thereby significantly reducing the problem of product shortage; during the processing of the preformed part, the unit consumption does not need to be unnecessarily increased, thereby reducing the cost of rubber materials; in the vulcanization production process, the work of manually adjusting the position of the preformed part is reduced, thereby improving production efficiency.

[0016] 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

[0017] Figure 1 It is a schematic diagram of the structure of an O-ring mold in the prior art;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3This is the AA cross-sectional view of the utility model;

[0020] Figure 4 This is a partial enlarged view of area B of the utility model;

[0021] In the figure: 1, upper die; 10, upper forming groove; 11, receiving groove; 12, exhaust hole; 2, lower die; 20, lower forming groove; 21, lower tearing edge groove; 22, mounting groove; 3, protrusion; 30, heat conduction hole. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 2-Figure 4 An O-ring processing mold shown in the figure includes an upper mold 1 and a lower mold 2, the upper mold 1 is provided with an upper molding groove 10, the lower mold 2 is provided with a lower molding groove 20, the lower molding groove 20 and the upper molding groove 10 form a molding cavity for the O-ring, the lower mold 2 is provided with a protrusion 3 protruding from the upper surface of the lower mold 2, the protrusion 3 is used to limit the side of the ring-shaped preform, and the side can be a ring-shaped upper mold 1. The upper surface of the upper mold 1 is provided with a receiving groove 11 for accommodating the protrusion 3, and the receiving groove 11 and the side of the protrusion 3 are clearance-matched.

[0024] During the processing, the outer side surface of the ring-shaped preform is first limited by the inner side surface of the protrusion 3 or the inner side surface of the ring-shaped preform is limited by the outer side surface of the protrusion 3, and then the upper mold 1 moves downward. During the downward movement of the upper mold 1, the lower surface of the lower mold 2 squeezes the ring-shaped preform downward and moves towards the O-shaped cavity until the O-shaped cavity is completely filled. The lower surface of the upper mold 1 contacts the lower surface of the lower mold 2. During the whole process, the ring-shaped preformed component is limited to avoid movement during the processing, thereby significantly reducing the problem of product shortage and increasing the processing molding rate. In addition, the unit consumption does not need to be increased in the processing of the ring-shaped preform, thereby reducing the use of materials and reducing the work of adjusting the position of the ring-shaped preform during the vulcanization production process, thereby improving production efficiency.

[0025] Preferably, when the bottom surface of the accommodating groove 11 contacts the upper surface of the protrusion 3, a molding cavity is formed between the lower molding groove 20 and the lower molding groove 20, that is, when the bottom surface of the accommodating groove 11 contacts the upper surface of the protrusion 3, the lower surface of the upper mold 1 contacts and presses against the upper surface of the lower mold 2, thereby limiting the position of the upper mold 1 and the lower mold 2 and preventing the preformed parts from accumulating on the top of the protrusion 3.

[0026] In some embodiments, preferably, the lower molding groove 20 is located on the outside of the protrusion 3, that is, during processing, the side of the receiving groove 11 of the upper mold 1 squeezes the preform outward to complete the molding, which is convenient for positioning the preform on the one hand, and increases the processing quality of the O-ring on the other hand.

[0027] As in the prior art, in order to facilitate the accommodation of waste materials, a lower tearing edge groove 21 is opened on the lower die 2.

[0028] In order to facilitate the positioning of the ring-shaped preform in some embodiments, preferably, the outer side surface of the protrusion 3 is a cylindrical surface, and the outer diameter of the protrusion 3 is not larger than the inner diameter of the ring-shaped preform, and the ring-shaped preform is sleeved on the outer side of the protrusion 3 during processing.

[0029] In order to further improve the processing quality of the O-ring in some embodiments, preferably, a vent hole 12 is opened on the upper mold 1, the vent hole 12 is connected to the receiving groove 11, and a heat conduction hole 30 is opened on the protrusion 3, and the heat conduction hole 30 is connected to the vent hole 12.

[0030] In order to further improve the processing quality of the O-ring in some embodiments, preferably, the diameter of the heat conducting hole 30 is larger than the diameter of the exhaust hole 12 .

[0031] In order to further improve the processing quality of the O-ring in some embodiments, preferably, the heat conducting hole 30 has a portion extending to the lower mold 2 and the depth of the portion of the heat conducting hole 30 extending to the lower mold 2 is greater than the depth of the lower molding groove 20 .

[0032] In order to facilitate the installation of the protrusion 3 in some embodiments, preferably, a mounting groove 22 is opened on the lower mold 2, and the protrusion 3 is installed in the mounting groove 22.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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. An O-ring processing mold, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) is provided with an upper molding groove (10), and the lower mold (2) is provided with a lower molding groove (20), wherein the lower molding groove (20) and the upper molding groove (10) form a molding cavity, characterized in that: The lower mold (2) is provided with a protruding portion (3) protruding from the upper surface of the lower mold (2), and the protruding portion (3) is used to limit the side of the ring-shaped preform, and the upper surface of the upper mold (1) is provided with a receiving groove (11) for receiving the protruding portion (3).

2. The O-ring processing mold according to claim 1, characterized in that: When the bottom surface of the accommodating groove (11) contacts the upper surface of the protruding portion (3), a molding cavity is formed between the lower molding groove (20) and the lower molding groove (20).

3. The O-ring processing mold according to claim 1, characterized in that: The lower molding groove (20) is located on the outer side of the protruding portion (3).

4. The O-ring processing mold according to claim 1, characterized in that: The lower die (2) is provided with a lower tearing edge groove (21).

5. The O-ring processing mold according to claim 1, characterized in that: The outer side surface of the protruding portion (3) is a cylindrical surface.

6. The O-ring processing mold according to any one of claims 1 to 5, characterized in that: The upper mold (1) is provided with an exhaust hole (12), the exhaust hole (12) is connected to the receiving groove (11), and the protruding portion (3) is provided with a heat conduction hole (30), the heat conduction hole (30) is connected to the exhaust hole (12).

7. The O-ring processing mold according to claim 6, characterized in that: The diameter of the heat conducting hole (30) is larger than the diameter of the exhaust hole (12).

8. The O-ring processing mold according to claim 6, characterized in that: The heat conducting hole (30) has a portion extending to the lower mold (2), and the depth of the portion of the heat conducting hole (30) extending to the lower mold (2) is greater than the depth of the lower molding groove (20).

9. The O-ring processing mold according to claim 8, characterized in that: The lower mold (2) is provided with a mounting groove (22), and the protruding portion (3) is mounted in the mounting groove (22).

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