Rubber pressing forming die for sealing ring

Abstract

The utility model discloses a rubber pressing forming die for a sealing ring, which relates to the technical field of sealing ring dies and comprises a forming die, a forming groove used for forming the sealing ring is arranged on the forming die, and overflow grooves used for burr overflow forming are arranged inside and outside a ring of the forming groove. The utility model provides a rubber pressing forming die for a sealing ring, which can reduce burrs in the production process of parts, reduce the difficulty of burr removal, ensure the surface quality and the dimensional accuracy of the parts, improve the production efficiency and reduce the production cost of products.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing ring moulds, in particular to a sealing ring rubber pressing mould. Background Art

[0002] In the known existing sealing ring pressing mold design, a direct parting surface structure with upper and lower flat surfaces is adopted. First, the raw material is placed in the mold, and then the upper and lower molds are closed by the equipment. After the pressing is completed, the burrs on the parting surface of the part are removed, as shown in the attached manual. Figure 2 shown.

[0003] After the part is pressed, due to structural reasons, large flat burrs of about 0.15mm will be generated on the entire parting surface of the part, while the thickness of the part is only 1mm. In the process of removing the burrs, the removal is not clean, which not only reduces the production efficiency, but also easily tears and breaks the parts, affecting the performance of the parts in subsequent products and failing to meet the user's technical requirements for the product.

[0004] Therefore, in order to solve the above problems, our technical personnel have specially developed a sealing ring pressing molding mold. Utility Model Content

[0005] The purpose of the utility model is to provide a sealing ring pressing molding die to solve the above problems, reduce burrs in the parts production process, reduce the difficulty of burr removal, ensure the surface quality and dimensional accuracy of the parts, improve production efficiency and reduce product production costs.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A sealing ring rubber pressing molding die comprises a molding die, a molding groove for sealing ring molding is arranged on the molding die, and overflow grooves for burr overflow molding are arranged inside and outside the molding groove.

[0008] As a further improvement of the above solution, a chamfered surface is provided at a position of the overflow groove close to the forming groove.

[0009] As a further improvement of the above solution, the chamfered surface forms an angle of 45° with the surface of the forming mold.

[0010] As a further improvement of the above solution, the margin between the overflow groove and the forming groove is no more than 0.09 mm, and the depth of the overflow groove on the forming die is 0.1-0.3 mm.

[0011] As a further improvement of the above solution, a rubber tearing edge is provided at the top of the overflow groove near the forming groove.

[0012] As a further improvement of the above solution, the burr is overflow-formed in the overflow groove with a thickness of 0.3-0.5 mm, and the burr is formed at the rubber tearing edge with a thickness of 0.05-0.08 mm.

[0013] As a further improvement of the above solution, after the sealing ring and the burr are formed, the weakest part of the connection position is torn open to separate the burr from the sealing ring.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Reduce burrs in the process of parts production and reduce the difficulty of burr removal, which ensures the surface quality and dimensional accuracy of parts, improves production efficiency and reduces product production costs.

[0016] 2. Overflow grooves, chamfered surfaces and rubber tearing edges are provided. When the raw materials are pressed and formed in the mold, the rough shape of the sealing ring parts with burrs is formed. Due to the existence of the overflow groove, 45° chamfered surface and rubber tearing edge, the burrs on the parting surface of the parts will be controlled at about 0.05-0.08mm, and the overflow part of the material is about 0.4mm, forming an obvious difference in thickness, and the strength of the thin part is the weakest. At this time, when removing the burrs and separating the parts from the burrs, due to the effect of the 45° chamfered surface and rubber tearing edge, the parts and the overflow part are easily disconnected at the weakest point of the burrs, basically reaching a burr-free state, and the surface quality and dimensional accuracy of the parts are guaranteed, which greatly improves production efficiency and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0018] Figure 2 The utility model relates to an existing sealing ring forming mold.

[0019] Figure 3 This is a schematic diagram of the main structure of the sealing ring and burr after forming of the utility model.

[0020] Figure 4 It is a schematic diagram of the top view of the structure of the sealing ring and burr after forming of the utility model.

[0021] The text markings in the figure indicate: 1. forming die; 2. overflow groove; 3. forming groove; 4. rubber tearing edge; 5. chamfered surface; 6. sealing ring; 7. burr. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution, the utility model is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0023] like Figure 1-2 As shown, the specific scheme of this embodiment is: a sealing ring pressing molding die, including a molding die 1, a molding groove 3 for molding a sealing ring 6 is arranged on the molding die 1, and overflow grooves 2 for overflow molding of burrs 7 are arranged inside and outside the molding groove 3.

[0024] Specifically, the overflow groove 2 is provided so that the burr 7 flows into the overflow groove 2 during the forming process, thereby reducing the thickness of the formed burr 7.

[0025] like Figure 1 As shown, as a preferred embodiment of the above embodiment, a chamfered surface 5 is provided at a position of the overflow groove 2 close to the forming groove 3 .

[0026] Specifically, the setting of the chamfered surface 5 is conducive to the formation of the burr 7 .

[0027] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the angle between the chamfered surface 5 and the surface of the forming mold 1 is 45°.

[0028] Specifically, the chamfered surface 5 is at an angle of 45°, so that the material can smoothly enter the overflow trough 2 during the overflow process.

[0029] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the margin between the overflow groove 2 and the forming groove 3 is not greater than 0.09 mm, and the depth of the overflow groove 2 on the forming mold 1 is 0.1-0.3 mm.

[0030] Specifically, the margin between the overflow groove 2 and the forming groove 3 should not be too large, otherwise the burr 7 cannot be formed in the overflow groove 2 .

[0031] like Figure 1 As shown, as a preferred embodiment of the above embodiment, a glue tearing edge 4 is provided at the top of the overflow groove 2 near the forming groove 3 .

[0032] Specifically, the setting of the rubber tearing edge 4 enables tearing at the weakest part of the connection between the burr 7 and the sealing ring 6, which is beneficial to the subsequent operation of removing the burr 7.

[0033] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the thickness of the burr 7 formed by overflow in the overflow groove 2 is 0.3-0.5 mm, and the thickness of the burr 7 formed at the rubber tearing edge 4 is 0.05-0.08 mm.

[0034] Specifically, the burr 7 is formed to have a thickness of 0.05-0.08 mm at the rubber tearing edge 4 , which is conducive to the removal of the burr 7 .

[0035] like Figure 1As shown, as a preferred embodiment of the above embodiment, after the sealing ring 6 and the burr 7 are formed, the weakest part of the connection position is torn open, and the burr 7 is separated from the sealing ring 6.

[0036] Specifically, the weakest part of the connection between the sealing ring 6 and the burr 7 after molding reduces the difficulty of removing the burr 7 .

[0037] The specific working principle of the utility model is as follows: after the raw materials are pressed and formed in the mold, a blank shape of a sealing ring 6 part with burrs 7 is formed. Due to the presence of the overflow groove 2, the chamfered surface 5 and the rubber tearing edge 4, the burr 7 on the parting surface will be controlled at about 0.05-0.08mm, and the overflow part of the material is about 0.4mm, forming an obvious drop in thickness, and the strength of the thin part is the weakest. At this time, when the burr 7 is removed to separate the part from the burr 7, due to the effect of the 45° chamfered surface 5 and the rubber tearing edge 4, the part and the overflow part are easily disconnected at the weakest point of the burr 7, basically reaching a burr-free state, the surface quality and dimensional accuracy of the part are guaranteed, and the production efficiency and production cost are greatly improved.

[0038] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A sealing ring rubber pressing molding die, characterized in that: The molding die (1) comprises a molding groove (3) for molding a sealing ring (6), and overflow grooves (2) for overflow molding of burrs (7) are arranged inside and outside the molding groove (3).

2. A sealing ring rubber pressing molding die according to claim 1, characterized in that: The overflow groove (2) is provided with a chamfered surface (5) at a position close to the forming groove (3).

3. A sealing ring rubber pressing molding die according to claim 2, characterized in that: The chamfered surface (5) forms an angle of 45° with the surface of the forming mold (1).

4. A sealing ring rubber pressing molding die according to claim 3, characterized in that: The margin between the overflow groove (2) and the forming groove (3) is no more than 0.09 mm, and the depth of the overflow groove (2) on the forming die (1) is 0.1-0.3 mm.

5. A sealing ring rubber pressing molding die according to claim 4, characterized in that: A rubber-tearing cutting edge (4) is provided at the top of the overflow groove (2) near the forming groove (3).

6. A sealing ring rubber pressing molding die according to claim 5, characterized in that: The burr (7) has an overflow molding thickness of 0.3-0.5 mm in the overflow groove (2), and a molding thickness of 0.05-0.08 mm at the rubber tearing edge (4).

7. A sealing ring rubber pressing molding die according to claim 6, characterized in that: After the sealing ring (6) and the burr (7) are formed, the weakest part of the connection position is torn open, and the burr (7) is separated from the sealing ring (6).

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