Sealing structure and liquid-filled bulging die

Abstract

The utility model belongs to the technical field of liquid-filled bulging, and provides a sealing structure and a liquid-filled bulging die, the sealing structure comprises a sealing surface and an O-shaped sealing ring, the sealing surface is provided with a sealing ring groove recessed from the surface, the sealing ring groove is used for placing the O-shaped sealing ring, and the O-shaped sealing ring is arranged in the sealing ring groove. The sealing ring groove comprises a containing groove part and an opening groove part which are arranged in a centering mode in the vertical direction and connected in sequence, the cross section of the containing groove part is a square groove, and the width size range of the containing groove part is 1.20-1.25 times of the diameter size of the section of the O-shaped sealing ring. The depth size H1 of the accommodating groove part is the same as the depth size H2 of the open groove part; the width size range of the open slot part is 90%-95% of the diameter size of the section of the O-shaped sealing ring; the depth size range of the sealing ring groove is 75%-80% of the diameter size of the section of the O-shaped sealing ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid filling bulging, and in particular relates to a sealing structure and a liquid filling bulging die. Background Art

[0002] The material of O-ring is usually made of rubber, such as nitrile rubber (NBR), fluororubber (FKM), silicone (Silicone), ethylene propylene rubber (EPDM), hydrogenated nitrile rubber (HRBR), fluorosilicone rubber (FVMQ), tetrafluoroethylene rubber (AFLAS), perfluoroether (FFKM).

[0003] like Figure 1 As shown, a conventional O-type sealing structure is provided on the existing upper mold 1' of the mold. Figure 2 As shown, a conventional O-ring 3' is disposed on the existing lower mold 2' of the mold. Figure 1 and Figure 2 The O-type sealing structure 4' is a sealing groove with a rectangular cross section, and the O-type sealing ring 3' is placed in the rectangular sealing groove. The width of the rectangular sealing groove is greater than the diameter of the cross section of the O-type sealing ring 3'. The liquid for liquid bulging is located below the sheet material, and the sheet material is deformed upward after liquid bulging. After the liquid bulging is completed, a large amount of liquid will flow out at the moment of mold opening. Since the density of the O-type sealing ring 3' is lower than the density of water, the O-type sealing ring 3' will be flushed out of the O-type sealing structure 4', resulting in the need to re-place the O-type sealing ring 3' for each part processed.

[0004] If an O-type sealing structure 4 ′ is provided on the existing upper mold 1 ′, the opening of the O-type sealing structure 4 ′ faces downward, and the O-type sealing ring 3 ′ cannot be fixed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a sealing structure and a liquid-filling bulging mold to solve the problem that after liquid-filling bulging, the O-ring is flushed out of the sealing structure by the liquid and needs to be repeatedly installed.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A sealing structure, comprising a sealing surface and an O-type sealing ring, wherein the sealing surface is provided with a sealing ring groove recessed from the surface, the sealing ring groove is used to place the O-type sealing ring, and the sealing ring groove comprises:

[0008] A receiving groove portion and an opening groove portion are centrally arranged in the vertical direction and connected in sequence, wherein the cross section of the receiving groove portion is a square groove, and the width of the receiving groove portion is in the range of 1.20 to 1.25 times the cross-sectional diameter of the O-ring;

[0009] The depth dimension H1 of the receiving groove portion is the same as the depth dimension H2 of the opening groove portion;

[0010] The width of the opening groove is in the range of 90% to 95% of the cross-sectional diameter of the O-ring;

[0011] The depth dimension range of the sealing ring groove is 75%-80% of the cross-sectional diameter dimension of the O-ring.

[0012] Preferably, the side wall of the accommodating groove is connected to the groove bottom via a first arc portion, and the radius R1 of the first arc portion is in the range of 0.2 mm-1 mm.

[0013] Preferably, the opening groove portion comprises an opening portion and a transition portion, and the transition portion is arranged between the accommodating groove portion and the opening portion;

[0014] The sum of the dimension H22 of the opening portion along the depth direction of the sealing ring groove and the dimension H21 of the transition portion along the depth direction of the sealing ring groove is the same as the depth dimension H1 of the accommodating groove portion;

[0015] A dimension H21 of the opening along the depth direction of the sealing ring groove is 1 / 2-3 / 4 of a dimension H1 of the accommodating groove along the depth direction of the sealing ring groove.

[0016] Preferably, a dimension H21 of the transition portion along the depth direction of the sealing ring groove is the same as a dimension H22 of the opening groove portion along the depth direction of the sealing ring groove.

[0017] Preferably, an angle α between the transition portion and the accommodating groove portion in the width direction ranges from 45° to 60°.

[0018] Preferably, the transition portion is connected to the side wall of the accommodating groove portion via a second arc portion, and a radius R2 of the second arc portion is in the range of 0.2 mm to 1 mm.

[0019] Preferably, the transition portion and the side wall of the opening portion are connected via a third arc portion, the third arc portion is an arc convex toward the inside of the sealing ring groove, and the radius R3 of the third arc portion ranges from 0.5 mm to 1.5 mm.

[0020] Preferably, a fourth arc portion is provided at the outer end of the side wall of the opening, and a radius R4 of the fourth arc portion is in the range of 0.2 mm to 0.5 mm.

[0021] Preferably, the cross-sectional diameter of the O-ring is in the range of 3.5 mm to 10 mm.

[0022] A liquid-filled bulging mold comprises an upper mold, a lower mold and the sealing structure, wherein the sealing structure is arranged on the upper mold or the lower mold.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the width dimension of the opening groove in the utility model ranges from 90% to 95% of the cross-sectional diameter dimension of the O-ring, ensuring that the O-ring will not fall out of the sealing ring groove after installation. At the same time, if the width dimension of the opening groove is greater than 95% of the cross-sectional diameter dimension of the O-ring, it is easy to cause the structural strength of the opening groove to be insufficient, and it is easy to cause damage, crushing and other problems. If the width dimension of the opening groove is less than 90% of the cross-sectional diameter dimension of the O-ring, it will make it difficult for the O-ring to be installed into the sealing ring groove.

[0024] The depth of the sealing ring groove is 75%-80% of the cross-sectional diameter of the O-ring, that is, the dimension H1 of the O-ring protruding from the sealing structure is 20%-25% of the cross-sectional diameter of the O-ring, to ensure that the deformation of the O-ring after installation can meet the sealing requirements. At the same time, if the deformation of the O-ring exceeds 25%, it is easy to cause excessive deformation of the O-ring, which greatly reduces the service life of the O-ring.

[0025] The width dimension of the above-mentioned accommodating groove portion ranges from 1.20 times to 1.25 times the cross-sectional diameter dimension of the O-ring, and the depth dimension of the accommodating groove portion is the same as the depth dimension of the opening groove portion. The above-mentioned arrangement ensures that there is enough accommodating space for the O-ring to be deformed in the sealing structure. If the width dimension of the accommodating groove portion is less than 1.2 times the cross-sectional diameter dimension of the O-ring, it is easy to cause insufficient accommodating space in the accommodating groove portion after the O-ring is deformed, thereby affecting the sealing effect. If the width dimension of the accommodating groove portion is greater than 1.25 times the cross-sectional diameter dimension of the O-ring, it is easy for the contact strength between the deformed O-ring and the accommodating groove portion to be insufficient, and the supporting strength of the accommodating groove portion to the deformed O-ring to be insufficient, thereby affecting the sealing effect. In addition, due to the excessive size of the sealing structure, the structural strength of the sealing structure is insufficient, and it is easy to be damaged, crushed, and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an O-type sealing ring in the prior art being arranged on an upper mold of a liquid-filled bulging mold;

[0027] Figure 2 It is a structural schematic diagram of an O-type sealing ring in the prior art being arranged in the lower mold of a liquid-filled bulging mold;

[0028] Figure 3 It is a structural schematic diagram of the sealing structure in the utility model;

[0029] Figure 4It is a front view of the upper mold of the liquid-filled bulging mold in the utility model;

[0030] Figure 5 It is a structural schematic diagram of the upper mold of the liquid-filled bulging mold in the utility model;

[0031] Figure 6 It is a front view of the lower mold of the liquid-filled bulging mold in the utility model;

[0032] Figure 7 It is a structural schematic diagram of the lower mold of the liquid-filled bulging mold in the utility model.

[0033] Among them, 1', existing upper mold; 2', existing lower mold; 3', O-type sealing ring; 4', O-type sealing structure;

[0034] 100, sealing ring groove; 10, upper die; 20, lower die; 1, accommodating groove portion; 2, opening groove portion; 21, opening portion; 22, transition portion; 3, first circular arc portion; 4, second circular arc portion; 5, third circular arc portion; 6, fourth circular arc portion. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is 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 that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] 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 reference numerals throughout represent the same or similar elements or elements having 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.

[0042] like Figure 3-Figure 7As shown, a sealing structure is provided in this embodiment, which is arranged in the upper mold 10 or the lower mold 20 of the liquid-filled bulging mold. Specifically, the sealing structure includes a sealing surface and an O-type sealing ring. The sealing surface is provided with a sealing ring groove 100 which is concave from the surface. The sealing ring groove 100 is used to place the O-type sealing ring. The cross-sectional diameter size range of the O-type sealing ring is 3.5mm-10mm. In this embodiment, the cross-sectional diameter size range of the O-type sealing ring is 3.5mm-10mm, and the bulging pressure that the O-type sealing ring can withstand is 0-50MPa, but the bulging pressure is not 0.

[0043] The sealing ring groove 100 comprises a receiving groove portion 1 and an opening groove portion 2 which are arranged in the vertical direction and connected in sequence. The cross section of the receiving groove portion 1 is a square groove, and the width of the receiving groove portion 1 is in the range of 1.20 to 1.25 times the cross-sectional diameter of the O-ring. Figure 3 The sealing ring groove 100 is opened on the lower mold 20, and the position of the lower mold 20 is as shown in FIG. Figure 3 Describe the directions shown.

[0044] The depth dimension H1 of the receiving groove 1 is the same as the depth dimension H2 of the opening groove 2. The depth direction of the receiving groove 1 is the H direction as shown in the figure, and the width direction of the receiving groove 1 is the W direction as shown in the figure.

[0045] The width of the opening groove 2 is in the range of 90% to 95% of the cross-sectional diameter of the O-ring.

[0046] The depth dimension (H1+H2) of the sealing ring groove 100 is in the range of 75%-80% of the cross-sectional diameter dimension of the O-type sealing ring. That is, the dimension H3 of the protruding opening groove portion 2 of the O-type sealing ring installed in the sealing ring groove 100 is in the range of 20%-25% of the cross-sectional diameter dimension of the O-type sealing ring.

[0047] In this embodiment, the width of the opening groove is in the range of 90%-95% of the cross-sectional diameter of the O-ring, ensuring that the O-ring will not fall out of the sealing ring groove after installation. At the same time, if the width of the opening groove 2 is greater than 95% of the cross-sectional diameter of the O-ring, it is easy to cause the structural strength of the opening groove 2 to be insufficient, and it is easy to be damaged, crushed, etc. If the width of the opening groove 2 is less than 90% of the cross-sectional diameter of the O-ring, it will be difficult for the O-ring to be installed into the sealing ring groove 100.

[0048] The depth of the sealing ring groove 100 is in the range of 75%-80% of the cross-sectional diameter of the O-ring, that is, the dimension H3 of the O-ring protruding from the sealing structure is in the range of 20%-25% of the cross-sectional diameter of the O-ring, ensuring that the deformation of the O-ring after installation can meet the sealing requirements. At the same time, if the deformation of the O-ring exceeds 25%, it is easy to cause excessive deformation of the O-ring, which greatly reduces the service life of the O-ring.

[0049] The width dimension of the above-mentioned receiving groove portion 1 ranges from 1.20 times to 1.25 times the cross-sectional diameter dimension of the O-ring, and the depth dimension of the receiving groove portion 1 is the same as the depth dimension of the opening groove portion 2. The above-mentioned arrangement ensures that there is enough accommodation space for the O-ring after deformation in the sealing structure. If the width dimension of the receiving groove portion 1 is less than 1.2 times the cross-sectional diameter dimension of the O-ring, it is easy to cause insufficient accommodation space in the receiving groove portion 1 after the O-ring is deformed, affecting the sealing effect. If the width dimension of the receiving groove portion 1 is greater than 1.25 times the cross-sectional diameter dimension of the O-ring, it is easy for the contact strength between the deformed O-ring and the receiving groove portion 1 to be insufficient, and the supporting strength of the receiving groove portion 1 to the deformed O-ring is insufficient, affecting the sealing effect. In addition, due to the excessive size of the sealing structure, the structural strength of the sealing structure is insufficient, and it is easy to be damaged, crushed, and other problems.

[0050] Preferably, the side wall of the accommodating groove portion 1 is connected to the groove bottom via a first arc portion 3 , and the radius R1 of the first arc portion 3 is in the range of 0.2 mm to 1 mm.

[0051] When the O-ring is squeezed and deformed, when the liquid pressure enters the space between the O-ring and the receiving groove 1 on one side, the O-ring will be squeezed to the space between the O-ring and the receiving groove 1 on the other side, causing the O-ring to be skewed. If the first arc portion 3 is not provided, the O-ring will have no support between the side wall and the bottom of the receiving groove 1, affecting the sealing performance of the O-ring.

[0052] Preferably, the opening groove 2 includes a transition portion 22 and an opening portion 21, the transition portion 22 is arranged between the receiving groove 1 and the opening portion 21, and the sum of the dimension H22 of the opening 21 along the depth direction of the sealing ring groove 100 and the dimension H21 of the transition portion 22 along the depth direction of the sealing ring groove 100 is the same as the depth dimension H1 of the receiving groove 1. The dimension range H22 of the opening 21 along the depth direction of the sealing ring groove 100 is 1 / 2-3 / 4 of the dimension H1 of the receiving groove 1 along the depth direction of the sealing ring groove 100. The transition portion 22 is an inclined plane extending from the inner end of the opening 21 to the receiving groove 1. After the O-type sealing ring is squeezed, the O-type sealing ring presses against the transition portion 22 to support the deformed O-type sealing ring, thereby achieving sealing between the upper mold 10 and the lower mold 20, and after the O-type sealing ring is squeezed and deformed, it contacts the transition portion 22 to prevent the O-type sealing ring from being scratched during repeated deformation.

[0053] Preferably, a dimension H21 of the transition portion 22 along the depth direction of the sealing ring groove 100 is the same as a dimension H22 of the opening groove portion 2 along the depth direction of the sealing ring groove 100 .

[0054] Preferably, the included angle α between the transition portion 22 and the accommodating groove portion 1 in the width direction is in the range of 45°-60°.

[0055] Preferably, the transition portion 22 is connected to the side wall of the accommodating groove portion 1 via a second arc portion 4 , and the radius R2 of the second arc portion 4 ranges from 0.2 mm to 1 mm to prevent the O-ring from being scratched at the connection between the transition portion 22 and the accommodating groove portion 1 .

[0056] Because the above-mentioned O-ring will be squeezed and deformed during sealing, and because the liquid pressure enters the space between the O-ring and the receiving groove portion 1 on one side, the O-ring will be squeezed to the space between the O-ring and the receiving groove portion 1 on the other side, causing the O-ring to be skewed. If the second arc portion 4 is not provided, the O-ring will be easily scratched by the connection between the transition portion 22 and the receiving groove portion 1.

[0057] Preferably, the transition portion 22 and the side wall of the opening portion 21 are connected via a third arc portion 5 , and the third arc portion 5 is an arc convex toward the inside of the sealing ring groove 100 , and a radius R3 of the third arc portion 5 ranges from 0.5 mm to 1.5 mm.

[0058] Preferably, the outer end of the side wall of the opening 21 is provided with a fourth arc portion 6, and the size range of the radius R4 of the fourth arc portion 6 is 0.2mm-0.5mm. During installation, the O-ring needs to be squeezed and deformed to enter the sealing ring groove 100, and the fourth arc portion 6 is provided on the outer edge of the side wall of the opening 21 to facilitate the installation of the O-ring, and at the same time, to prevent the outer end of the side wall of the opening 21 from scratching the O-ring. If the size of the radius R4 of the fourth arc portion 6 is greater than 0.5mm, it is easy to cause the overhanging size at the fourth arc portion 6 to be large after the upper mold 10 and the lower mold 20 are molded, which is easy to cause a poor sealing effect. In addition, the size of the radius R4 of the fourth arc portion 6 is greater than 0.5mm, which will also lead to low strength at the opening groove portion 2, and the opening of the opening groove portion 2 is prone to wear and damage.

[0059] This embodiment also provides a liquid-filled bulging mold, which includes an upper mold 10 , a lower mold 20 , and the above-mentioned sealing ring groove 100 , and the sealing ring groove 100 is arranged on the surface of the upper mold 10 or the lower mold 20 .

[0060] Preferably, the sealing ring groove 100 is in the shape of a closed curve with a smooth transition, such as a circular shape or an elliptical shape.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A sealing structure, characterized in that: The sealing structure comprises a sealing surface and an O-type sealing ring, wherein the sealing surface is provided with a sealing ring groove (100) which is concave from the surface, and the sealing ring groove (100) is used to place the O-type sealing ring, and the sealing ring groove comprises: A receiving groove portion (1) and an opening groove portion (2) are centrally arranged in the vertical direction and connected in sequence, the cross section of the receiving groove portion (1) being a square groove, and the width of the receiving groove portion (1) being in the range of 1.20 to 1.25 times the cross-sectional diameter of the O-ring; The depth dimension H1 of the accommodating groove portion (1) is the same as the depth dimension H2 of the opening groove portion (2); The width of the opening groove (2) is in the range of 90% to 95% of the cross-sectional diameter of the O-ring; The depth dimension of the sealing ring groove (100) is in the range of 75% to 80% of the cross-sectional diameter dimension of the O-ring.

2. The sealing structure according to claim 1, characterized in that: The side wall of the accommodating groove portion (1) is connected to the groove bottom via a first arc portion (3), and the radius R1 of the first arc portion (3) has a size range of 0.2 mm to 1 mm.

3. The sealing structure according to claim 1, characterized in that: The opening groove portion (2) comprises an opening portion (21) and a transition portion (22), wherein the transition portion (22) is arranged between the accommodating groove portion (1) and the opening portion (21); The sum of a dimension H22 of the opening portion (21) along the depth direction of the sealing ring groove (100) and a dimension H21 of the transition portion (22) along the depth direction of the sealing ring groove (100) is the same as a depth dimension H1 of the accommodating groove portion (1); A dimension H21 of the opening portion (21) along the depth direction of the sealing ring groove (100) is 1 / 2 to 3 / 4 of a dimension H1 of the accommodating groove portion (1) along the depth direction of the sealing ring groove (100).

4. The sealing structure according to claim 3, characterized in that: A dimension H21 of the transition portion (22) along the depth direction of the sealing ring groove (100) is the same as a dimension H22 of the opening groove portion (2) along the depth direction of the sealing ring groove (100).

5. The sealing structure according to claim 4, characterized in that: The included angle α between the transition portion (22) and the accommodating groove portion (1) in the width direction is in the range of 45°-60°.

6. The sealing structure according to claim 5, characterized in that: The transition portion (22) is connected to the side wall of the accommodating groove portion (1) via a second arc portion (4), and the radius R2 of the second arc portion (4) is in the range of 0.2 mm to 1 mm.

7. The sealing structure according to claim 3, characterized in that: The transition portion (22) and the side wall of the opening portion (21) are connected via a third arc portion (5), the third arc portion (5) being an arc convex toward the inside of the sealing ring groove (100), and the radius R3 of the third arc portion (5) is in the range of 0.5 mm to 1.5 mm.

8. The sealing structure according to claim 3, characterized in that: A fourth arc portion (6) is provided at the outer end of the side wall of the opening portion (21), and the radius R4 of the fourth arc portion (6) has a size range of 0.2 mm to 0.5 mm.

9. The sealing structure according to any one of claims 1 to 8, characterized in that: The cross-sectional diameter of the O-ring is in the range of 3.5 mm to 10 mm.

10. A liquid-filled bulging mold, characterized in that: It comprises an upper mold (10), a lower mold (20) and a sealing structure according to any one of claims 1 to 9, wherein the sealing structure is arranged on the upper mold (10) or the lower mold (20).

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