Casting mold for floating oil seal ring

Abstract

The utility model discloses a casting mould for a floating oil seal ring, the floating oil seal ring comprises a main body, the main body comprises a first end and a second end which are opposite to each other, an inner hole of the first end is provided with a chamfer, the casting mould comprises a first split body and a second split body, the floating oil seal ring comprises a first split body and a second split body, the first split body is provided with a cavity used for forming the floating oil seal ring body, the second split body is provided with a mold core used for forming the chamfer, the second split body is fixedly arranged on the first split body in a penetrating mode so that the mold core can stretch into the cavity, and the second split body is further provided with a pouring gate. According to the scheme, secondary machining of the floating oil seal ring can be avoided, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casting moulds, in particular to a casting mould for a floating oil seal ring. Background Art

[0002] Centrifugal casting is a casting method that injects molten metal into a high-speed rotating casting mold, allowing the metal liquid to fill the mold cavity under the action of centrifugal force, cool, crystallize and solidify to form a casting. Centrifugal casting has the advantages of no need for cores, high yield rate, high casting density and less pollution. It is the preferred manufacturing process for floating oil seal rings.

[0003] Traditional centrifugal casting molds are generally designed as coreless structures, that is, the inner surface of the casting is not restricted by the core, so the inner hole surface of the molded casting is a free surface. For the inner hole, a floating oil seal ring of a certain shape is required (such as Figure 1 As for the floating oil seal ring shown in the figure, the inner hole at one end of which is provided with a chamfer, it is usually first formed by a centrifugal casting mold and then the chamfer is machined by a machining process. Since the floating oil seal ring is made of a highly wear-resistant, high-hardness and high-brittle material, machining is extremely difficult, resulting in low machining efficiency. Utility Model Content

[0004] In order to overcome the defects in the prior art, an embodiment of the utility model provides a casting mold for a floating oil seal ring, which is used to solve the above-mentioned problems.

[0005] The embodiment of the present application discloses: a casting mold for a floating oil seal ring, the floating oil seal ring includes a main body, the main body includes a first end and a second end opposite to each other, the inner hole of the first end is provided with a chamfer, the casting mold includes: a first split body and a second split body, the first split body has a cavity for forming the floating oil seal ring main body, the second split body has a core for forming the chamfer, the second split body is fixedly penetrated on the first split body so that the core extends into the cavity, and the second split body is also provided with a casting port.

[0006] Specifically, the first sub-body and the second sub-body are interference fit, and the contact surface between the first sub-body and the second sub-body is a conical surface.

[0007] Specifically, the casting mold further includes a metal shell, and the metal shell is disposed outside the first split body and the second split body.

[0008] Specifically, the metal shell includes an annular side wall and an end wall connected to the side wall, and the end wall is provided with a through hole for avoiding the casting port.

[0009] Specifically, the first split body is interference fit with the side wall of the metal shell, and the ends of the first split body and the second split body are both in contact with the end wall of the metal shell.

[0010] The utility model has at least the following beneficial effects: the casting mold of the present embodiment is of split design, and the main body of the floating oil seal ring and the chamfer on the main body can be formed at one time through the cooperation between the cavity of the first split and the core of the second split, without the need for machining the chamfer in a later process, thus solving the problem of the difficulty of chamfer machining, avoiding the lengthening of the process turnover caused by secondary processing, improving the production efficiency of the floating oil seal ring and saving production costs.

[0011] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of a floating oil seal ring in an embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram of a casting mold for a floating oil seal ring in an embodiment of the utility model.

[0015] The figure markings of the above drawings are: 1, first sub-body; 11, cavity; 2, second sub-body; 21, core; 22, casting port; 3, metal shell; 31, side wall; 32, end wall; 10, main body; 110, first end; 120, second end. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "fixed", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0018] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "below" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0019] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0020] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0021] The casting mold for the floating oil seal ring of this embodiment is used to prepare a floating oil seal ring with a chamfered end. Figure 1 As shown, the floating oil seal ring of this embodiment includes a main body 10, and the main body 10 includes a first end 110 and a second end 120 arranged opposite to each other, wherein the inner hole of the first end 110 is provided with a chamfer.

[0022] like Figure 2As shown, the casting mold of this embodiment mainly includes a first sub-body 1 and a second sub-body 2. Among them, the first sub-body 1 has a cavity 11 for forming the main body 10 of the floating oil seal ring; the second sub-body 2 has a core 21 for forming the chamfer on the inner hole of the first end 110 of the main body 10, and the second sub-body 2 is also provided with a casting port 22 for the metal liquid to flow into the cavity 11. The second sub-body 2 can be penetrated on the first sub-body 1 and fixedly connected with the first sub-body 1, so that the core 21 on the second sub-body 2 can extend into the cavity 11 of the first sub-body 1. The core 21 of the second sub-body 2 cooperates with the cavity 11 of the first sub-body 1 to form the main body 10 of the floating oil seal ring and the chamfer on the main body 10 at one time, without the need to machine the chamfer in the later process, which solves the problem of the difficulty of chamfering machining, improves the production efficiency of the floating oil seal ring, and saves production costs.

[0023] Specifically, the first sub-body 1 and the second sub-body 2 of this embodiment are fixedly connected by interference fit. Figure 2 As shown, the contact surface between the first sub-body 1 and the second sub-body 2 is a conical surface. Further, the end of the first sub-body 1 for connecting with the second sub-body 2 is provided with a conical hole, and the end of the second sub-body 2 provided with the core 21 is conical, and the wall surface where the two contact each other is a conical surface. In this way, the convenience and reliability of the connection between the two can be improved.

[0024] like Figure 2 As shown, the casting mold of this embodiment further includes a metal shell 3, which is disposed outside the first sub-body 1 and the second sub-body 2 and is located above the first sub-body 1 and the second sub-body 2, and is used to further fix the first sub-body 1 and the second sub-body 2. Specifically, the metal shell 3 of this embodiment includes an annular side wall 31 and an end wall 32 connected to the side wall 31, and the end wall 32 is provided with a through hole for avoiding the casting port 22. Preferably, the side wall 31 and the end wall 32 of the metal shell 3 are integrally formed.

[0025] Specifically, the first sub-body 1 is interference fit with the side wall 31 of the metal shell 3, and the upper ends of the first sub-body 1 and the second sub-body 2 are both in contact with the end wall 32 of the metal shell 3. In this way, the metal shell 3 can better fasten the first sub-body 1 and the second sub-body 2.

[0026] The method of using the casting mold of this embodiment is as follows: place the mold in a centrifugal casting machine and fix it, start the centrifugal casting machine, inject molten metal into the casting port 22, and control the rotation time and speed through a program to shape the molten metal in the mold. With the cooperation of the first sub-body 1 and the second sub-body 2, the main body 10 of the floating oil seal ring and the chamfer on the main body 10 can be formed at one time. The size of the casting is calculated by the metal shrinkage rate to design the size of the cavity 11 and the core 21, and the temperature of the molten metal and the centrifugal casting parameters are controlled to achieve the shrinkage size of the casting, and then the demolding and continuous casting effect are achieved by gravity.

[0027] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A casting mold for a floating oil seal ring, the floating oil seal ring comprising a main body, the main body comprising a first end and a second end opposite to each other, the inner hole of the first end is provided with a chamfer, characterized in that: The casting mold includes: a first split body and a second split body, the first split body has a cavity for forming the floating oil seal ring body, the second split body has a core for forming the chamfer, the second split body is fixedly penetrated on the first split body so that the core extends into the cavity, and the second split body is also provided with a casting port.

2. The casting mold for a floating oil seal ring according to claim 1, characterized in that: The first sub-body and the second sub-body are interference fit, and the contact surface between the first sub-body and the second sub-body is a conical surface.

3. The casting mold for a floating oil seal ring according to claim 1, characterized in that: The casting mold further comprises a metal shell, and the metal shell is disposed outside the first split body and the second split body.

4. The casting mold for a floating oil seal ring according to claim 3, characterized in that: The metal shell comprises an annular side wall and an end wall connected to the side wall, and the end wall is provided with a through hole for avoiding the casting port.

5. The casting mold for a floating oil seal ring according to claim 4, characterized in that: The first split body is interference-fitted with the side wall of the metal shell, and the ends of the first split body and the second split body are both in contact with the end wall of the metal shell.

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