Sealing structure

Abstract

The utility model discloses a sealing structure which comprises a cover plate, a cavity shell and a steel plate, the cover plate covers the top of the cavity shell and is in sealing connection with the cavity shell, and the steel plate is arranged at the bottom of the cavity shell; wherein the steel plate is provided with a gluing part, the gluing part is provided with convex points, the cavity shell is provided with a sealing part, the sealing part is arranged on the gluing part in a stacked mode, and the sealing part and the gluing part are connected in a sealed mode. According to the utility model, surface characteristics are added on the gluing part corresponding to the sealing part on the steel plate, namely marks similar to hard spots are added on the surface of the steel plate functional area (namely the gluing part), so that the bonding area of the steel plate functional area is increased, the bonding effect of the surface of the steel sheet is enhanced, and the sealing effect of the cavity is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a sealing structure. Background Art

[0002] In order to achieve certain functions in plastic products, steel plates can be embedded in the injection molding process to obtain corresponding injection molded steel plates, insert products, etc. However, injection molded steel plates, insert products, etc. may experience steel-plastic separation, air leakage, etc. To solve the above problems, the oil stains on the surface of the steel plate can be cleaned, or paint can be applied to the surface of the metal insert as a transition layer. However, it should be pointed out that this method of cleaning the oil stains on the surface of the steel plate before injection molding increases the cost of cleaning the steel plate, and the surface of the steel plate must be ensured not to be contaminated during the turnover and transportation process. In addition, coating the surface of the steel plate with paint will also increase the cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a sealing structure to solve the problems of poor sealing performance and high cost of existing products such as injection-molded steel plates.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A sealing structure comprises a cover plate, a cavity shell and a steel plate, wherein the cover plate covers the top of the cavity shell and is sealed with the cavity shell, and the steel plate is arranged at the bottom of the cavity shell; wherein the steel plate is provided with a glue coating portion, the glue coating portion is provided with convex points, the cavity shell is provided with a sealing portion, the sealing portion is stacked on the glue coating portion, and the sealing portion and the glue coating portion are sealed with each other.

[0006] Furthermore, in the sealing structure described in the utility model, the sealing portion and the glue coating portion are sealed and connected by glue.

[0007] Furthermore, in the sealing structure described in the present invention, a through hole is provided at the bottom of the cavity shell, and the sealing portion is arranged around the periphery of the through hole.

[0008] Furthermore, in the sealing structure described in the present invention, the width d of the glue coating portion satisfies the following range: d≥0.5 mm.

[0009] Furthermore, in the sealing structure described in the utility model, a first card groove extending along a first direction is provided on the bottom of the cavity shell, and a first card connection portion extending along the first direction is provided on the steel plate; wherein the first card connection portion is used to be inserted into the first card groove correspondingly so that the cavity shell and the steel plate are card-connected and fixed to each other.

[0010] Furthermore, in the sealing structure described in the utility model, a second card groove extending along the second direction is provided on the bottom of the cavity shell, and a second card connection portion extending along the second direction is provided on the steel plate; wherein the second card connection portion is used to be inserted into the second card groove correspondingly so that the cavity shell and the steel plate are card-connected and fixed to each other.

[0011] Furthermore, in the sealing structure described in the present invention, the first direction is perpendicular to the second direction.

[0012] Furthermore, in the sealing structure described in the utility model, a convex layer is provided on the bottom surface of the cavity shell close to the steel plate, and a hollow portion is provided on the steel plate, wherein the convex layer is used to correspond to the hollow portion so that the cavity shell and the steel plate are clamped and fixed to each other.

[0013] Furthermore, in the sealing structure described in the present invention, it also includes a plurality of air inlets, and the air inlets are arranged on the cavity shell.

[0014] Furthermore, in the sealing structure described in the present invention, the multiple air inlets include at least a first air inlet and a second air inlet, and the first air inlet and the second air inlet are arranged on the side wall of the cavity shell at intervals.

[0015] The beneficial effect of the utility model is that the utility model provides a sealing structure, which includes a cover plate, a cavity shell and a steel plate, the cover plate is sealed and covered on the top of the cavity shell, and the steel plate is arranged at the bottom of the cavity shell. On this basis, a glue coating part with convex points is arranged on the steel plate, and a sealing part is correspondingly arranged on the cavity shell, so that the sealing part is stacked on the glue coating part and the two are connected by sealing. That is, the utility model adds surface features on the glue coating part corresponding to the sealing part on the steel plate, that is, a mark similar to pockmarks (i.e., convex points) is pressed on the surface of the functional area of ​​the steel plate (i.e., the glue coating part), thereby increasing the bonding area of ​​the functional area of ​​the steel plate, enhancing the bonding effect of the steel sheet surface, and effectively improving the cavity sealing effect. In practical applications, after the utility model adds convex points to the glue coating part, the dyne value of the steel sheet surface only needs to be greater than 34 to achieve the required sealing effect. Compared with the prior art that requires the dyne value of the steel sheet surface to be greater than 40 to ensure the bonding effect, the utility model can effectively ensure airtightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the sealing structure of the utility model in one embodiment at one viewing angle;

[0017] Figure 2 It is a structural explosion diagram of the sealing structure of the utility model in one embodiment at one viewing angle;

[0018] Figure 3 It is a schematic structural diagram of the cavity housing of the utility model in one embodiment at one viewing angle;

[0019] Figure 4 It is a structural schematic diagram of the cavity housing of the utility model in another viewing angle under one embodiment;

[0020] Figure 5 It is a structural schematic diagram of the steel plate of the utility model in another viewing angle under one implementation mode;

[0021] Figure 6 It is a structural schematic diagram of the steel plate of the utility model in another viewing angle under one implementation mode;

[0022] Figure 7 It is a cross-sectional schematic diagram of the sealing structure described in the utility model under a viewing angle in an implementation manner.

[0023] Description of labels:

[0024] 1. Cover plate;

[0025] 2. Cavity housing; 21. Sealing portion; 22. Through hole; 23. First card slot; 24. Second card slot; 25. Convex layer; 26. Air inlet;

[0026] 3. Steel plate; 31. Glue coating portion; 32. First clamping portion; 33. Second clamping portion; 34. Hollow portion; 35. Slit portion. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0028] Please refer to Figures 1 to 7 The utility model designs a sealing structure, which includes a cover plate 1, a cavity shell 2 and a steel plate 3, wherein the cover plate 1 covers the top of the cavity shell 2 and is sealed with the cavity shell 2, and the steel plate 3 is arranged at the bottom of the cavity shell 2; wherein the steel plate 3 is provided with a glue coating portion 31, and the glue coating portion 31 is provided with convex points, and the cavity shell 2 is provided with a sealing portion 21, and the sealing portion 21 is correspondingly stacked on the glue coating portion 31, and the sealing portion 21 is sealed with the glue coating portion 31.

[0029] In the above technical scheme of the utility model, the utility model provides a sealing structure, which includes a cover plate 1, a cavity shell 2 and a steel plate 3, wherein the cover plate 1 is sealed and covered on the top of the cavity shell 2, and the steel plate 3 is arranged at the bottom of the cavity shell 2. On this basis, a glue coating part 31 with convex points is arranged on the steel plate 3, and a sealing part 21 is correspondingly arranged on the cavity shell 2, so that the sealing part 21 is stacked on the glue coating part 31 and sealed and connected by a seal. That is, the utility model adds surface features to the glue coating part 31 corresponding to the sealing part 21 on the steel plate 3, that is, during the molding process of the steel plate 3, an embossing process is added in the mold, and a mark similar to pockmarks is pressed on the surface of the functional area of ​​the steel plate 3 (that is, the glue coating part 31), thereby increasing the bonding area of ​​the functional area of ​​the steel plate 3, enhancing the bonding effect of the steel sheet surface, and effectively improving the cavity sealing effect. In practical applications, after the utility model adds convex points (i.e., pits) to the glue coating portion 31, the required sealing effect can be achieved only if the dyne value of the steel sheet surface is greater than 34. Compared with the prior art which requires the dyne value of the steel sheet surface to be greater than 40 to ensure the bonding effect, the utility model can effectively ensure airtightness.

[0030] Furthermore, in the sealing structure described in the present invention, the sealing portion 21 and the glue coating portion 31 are sealed and connected by glue.

[0031] In the above technical solution of the utility model, the sealing part 21 and the glue coating part 31 are sealed and connected by glue, that is, the glue coating and sealing are performed in the combination functional area of ​​the steel sheet and the plastic, which can effectively improve the sealing effect of the cavity.

[0032] Furthermore, in the sealing structure described in the present invention, a through hole 22 is provided at the bottom of the cavity housing 2 , and the sealing portion 21 is arranged around the periphery of the through hole 22 .

[0033] In the above technical solution of the utility model, a sealing part 21 is arranged around the through hole 22, so that when the cavity shell 2 and the steel plate 3 are sealed, the sealing part 21, the glue coating part 31 and the glue can cooperate to effectively perform the sealing, thereby improving the cavity sealing effect.

[0034] Furthermore, in the sealing structure described in the present invention, the width d of the glue coating portion satisfies the range of d≥0.5 mm.

[0035] In the above technical solution of the utility model, the width d of the glue coating portion is made ≥ 0.5 mm. It should be noted that, within a certain range, the wider the width of the glue coating portion, the better the effect, thereby ensuring that the glue coating portion has a large enough range for glue sealing, thereby ensuring the cavity sealing effect.

[0036] Furthermore, in the sealing structure described in the utility model, a first card groove 23 extending along a first direction is provided on the bottom of the cavity shell 2, and a first card connection portion 32 extending along the first direction is provided on the steel plate 3; wherein, the first card connection portion 32 is used to be inserted into the first card groove 23 to enable the cavity shell 2 and the steel plate 3 to be card-connected and fixed to each other.

[0037] In the above technical solution of the utility model, a first card slot 23 is provided on the bottom of the cavity shell 2, and correspondingly, a first card connection portion 32 is provided on the steel plate 3. When the cavity shell 2 and the steel plate 3 are fixed, the first card connection portion 32 can be correspondingly inserted into the first card slot 23 so that the cavity shell 2 and the steel plate 3 are card-connected and fixed to each other in the first direction.

[0038] Furthermore, in the sealing structure described in the utility model, a second card groove 24 extending along the second direction is provided on the bottom of the cavity shell 2, and a second card connection portion 33 extending along the second direction is provided on the steel plate 3; wherein the second card connection portion 33 is used to be inserted into the second card groove 24 to enable the cavity shell 2 and the steel plate 3 to be card-connected and fixed to each other.

[0039] In the above technical solution of the utility model, a second card slot 24 is provided on the bottom of the cavity shell 2, and correspondingly, a second card connection portion 33 is provided on the steel plate 3. When the cavity shell 2 and the steel plate 3 are fixed, the second card connection portion 33 can be correspondingly inserted into the second card slot 24 so that the cavity shell 2 and the steel plate 3 are card-connected and fixed to each other in the second direction.

[0040] Furthermore, in the sealing structure described in the present invention, the first direction is perpendicular to the second direction.

[0041] In the above technical solution of the utility model, the above first direction is made perpendicular to the second direction, so that the fixing direction of the first card slot 23 and the first card connection portion 32 can be perpendicular to the fixing direction of the second card slot 24 and the second card connection portion 33, ensuring that the cavity shell 2 and the steel plate 3 can be fixed in different fixing directions respectively, further ensuring the stability of the two.

[0042] Furthermore, in the sealing structure described in the present invention, a convex layer 25 is provided on the bottom surface of the cavity shell 2 close to the steel plate 3, and a hollow portion 34 is provided on the steel plate 3, wherein the convex layer 25 is used to be correspondingly inserted into the hollow portion 34 so that the cavity shell 2 and the steel plate 3 are clamped and fixed to each other.

[0043] In the above technical solution of the utility model, a convex layer 25 is arranged on the cavity shell 2, and a hollow portion 34 is correspondingly arranged on the steel plate 3, so that when the cavity shell 2 and the steel plate 3 are clamped and fixed, the convex layer 25 can be clamped into the hollow portion 34 to further clamp and fix the cavity shell 2 and the steel plate 3 to each other.

[0044] Furthermore, the sealing structure described in the present invention further includes a plurality of air inlets 26 , and the air inlets 26 are arranged on the cavity shell 2 .

[0045] In the above technical solution of the present invention, a plurality of air inlets 26 are provided on the sealing structure, and the air tightness test of the sealing structure can be conveniently and effectively performed through the air inlets 26 .

[0046] Furthermore, in the sealing structure described in the present invention, the plurality of air inlets 26 include at least a first air inlet 26 and a second air inlet 26 , and the first air inlet 26 and the second air inlet 26 are arranged on the side wall of the cavity shell 2 at intervals.

[0047] In the above technical solution of the utility model, two air inlets 26 are spaced apart on the side wall of the cavity shell 2, and the test gas can enter the interior of the sealed structure cavity through the two air inlets 26, thereby applying a certain pressure of gas to the interior of the cavity to simulate actual working conditions, thereby evaluating its airtight performance and detecting the overall leakage situation.

[0048] Please refer to Figures 1 to 7 , Embodiment 1 of the present utility model is:

[0049] A sealing structure includes a cover plate 1, a cavity shell 2 and a steel plate 3. The cover plate 1 covers the top of the cavity shell 2 and is sealed with the cavity shell 2. The steel plate 3 is arranged at the bottom of the cavity shell 2, that is, the cavity shell 2 is arranged between the cover plate 1 and the steel plate 3. Figures 1 to 7 The cover plate 1, the cavity shell 2 and the steel plate 3 are specifically introduced.

[0050] In this embodiment, the shape of the cover plate 1 is similar to a rectangle, and the shape of the cover plate 1 is adapted to the shape of the cavity shell 2 so as to overlap the upper part of the cavity shell 2. The cavity shell 2 is a groove with an opening upward, and the groove includes a rectangular groove bottom and four side walls, and the four side walls are vertically arranged on the four sides of the rectangular groove bottom and extend in a direction away from the rectangular groove bottom. A through hole 22 is provided at the bottom of the cavity shell 2, that is, the groove bottom of the groove, and the through hole 22 is arranged at one of the side edges close to the groove bottom, and the shape of the through hole 22 is similar to a rectangle with two rounded corners. A sealing portion 21 is provided around the through hole 22, and the sealing portion 21 and the side edges of the groove bottom together form the through hole 22. Two air inlets 26 (i.e., the first air inlet 26 and the second air inlet 26) extending in the first direction are provided on the side wall near the through hole 22. The two air inlets 26 are arranged at intervals on the side wall of the cavity shell 2, and the total length of the two air inlets 26 in the length direction of the cavity shell 2 is approximately equal to the total length of the through hole 22 in the length direction of the cavity shell 2. In addition, in this embodiment, a concave portion is provided on the bottom surface of the cavity shell 2, that is, the bottom surface of the cavity shell 2 near the steel plate 3, and a convex layer 25 is provided in the concave portion. The convex layer 25 protrudes upward from the bottom surface of the concave portion, and the concave portion and the convex layer 25 are surrounded to form a first card slot 23, and the extension direction of the first card slot 23 is the first direction. In addition, two protrusions and two second card slots 24 are also provided at the bottom of the cavity shell 2. The two protrusions extend upward from the bottom of the second card slot 24, and the extension direction of the second card slot 24 is the second direction. It should be pointed out that the first direction is the length direction of the cavity shell 2 , the second direction is the width direction of the cavity shell 2 , and the first direction is perpendicular to the second direction.

[0051] In this embodiment, the steel plate 3 is in the shape of a straight plate, and a runway-shaped hollow portion 34 is provided on the steel plate 3, one end of the hollow portion 34 is open, and the hollow portion 34 can be used to be inserted into the convex layer 25, so that the cavity shell 2 and the steel plate 3 are clamped and fixed to each other. In addition, a first clamping portion 32 extending along the first direction and a second clamping portion 33 extending along the second direction are also provided on the steel plate 3, and the first clamping portion 32 is arranged around the periphery of the hollow portion 34. Among them, the first clamping portion 32 is used to be inserted into the first clamping groove 23 correspondingly, so that the cavity shell 2 and the steel plate 3 are clamped and fixed to each other in the first direction, and the second clamping portion 33 is used to be inserted into the second clamping groove 24 correspondingly, so that the cavity shell 2 and the steel plate 3 are clamped and fixed to each other in the second direction. In addition, two slit portions 35 are also provided on the side of the steel plate 3 away from the cavity shell 2, one of which extends along the first direction, and the other is in the shape of an arc. It should be pointed out that the area of ​​0.5 mm on both sides of the steel-plastic junction line of the steel plate 3 is the glue coating part 31, the width of the glue coating part 31 is 1 mm and has been pitted, that is, a convex point (i.e., glue coating part) with a total width of 1 mm is provided inside and outside the steel-plastic junction line. It should be noted that the position of the steel-plastic junction line corresponds to the position of the hole edge of the through hole 22, that is, the position of the steel-plastic junction line and the hole edge of the through hole 22 are on the same horizontal line, and the two are only at different heights, such as Figure 7 The glue coating part 31 is Figure 7 The area enclosed by the solid lines in the figure (except the outer edge of the figure) is similar to a rectangular ring (the two corners of which are rounded). The glue coating portion 31 and the sealing portion 21 are sealed by glue. This embodiment increases the surface features of the steel sheet. For example, during the steel sheet forming process, an embossing process can be added to the mold to press out marks similar to pockmarks on the surface of the functional area of ​​the steel sheet, thereby increasing the bonding area of ​​the functional area of ​​the steel sheet and enhancing the bonding effect. It should be noted that the sealing portion 21 and the glue coating portion 31 can be sealed and connected by glue.

[0052] In practical applications, the sealing structure of the present embodiment can be tested for air tightness, and the test conditions can be as follows: Air Pressure 15.1±0.8kPa in 2s, Holding time 11.5s (within±300pa), Measurement time 5.5s (within±50pa), specifically: during the test, the required air pressure should be 15.1 kilopascals (kPa), and the air pressure value allows a certain fluctuation range, i.e. ±0.8kPa. In other words, the actual air pressure can vary between 14.3kPa and 15.9kPa. In addition, the air pressure should be reached and stabilized within this range within 2 seconds to avoid test errors caused by air pressure changes. After the air pressure reaches stability, the time required to keep this air pressure value unchanged is 11.5 seconds. During the 11.5 seconds of holding the air pressure, the fluctuation range of the air pressure should not exceed ±300 pa (pa). In other words, the air pressure should be kept within a certain range and cannot rise or fall significantly to ensure the accuracy of the test results. During the period when the air pressure remains stable, there are 5.5 seconds for actual measurement or data collection. During the 5.5 seconds of measurement time, the fluctuation of the air pressure should not exceed ±50 Pa. In this embodiment, after adding convex points on the glue coating part of the steel plate 3, that is, after pressing out a mark similar to pitting on the surface of the functional area (i.e., the glue coating part 31) of the steel plate 3, the sealing effect can be achieved only if the dyne value of the steel sheet surface is greater than 34. Compared with the prior art that requires the dyne value of the steel sheet surface to be greater than 40 to ensure the bonding effect, this embodiment can effectively improve the cavity sealing effect and ensure airtightness.

[0053] In summary, the sealing structure provided by the utility model: adding surface features to the glue coating part 31 on the steel plate 3 corresponding to the sealing part 21, that is, during the molding process of the steel plate 3, adding an embossing process in the mold, pressing out marks similar to pits on the surface of the functional area of ​​the steel plate 3 (i.e., the glue coating part 31), thereby increasing the bonding area of ​​the functional area of ​​the steel plate 3, enhancing the bonding effect of the steel sheet surface, and thus effectively improving the cavity sealing effect. In other words, this embodiment makes pitting treatment with a total width of 1mm inside and outside the steel-plastic bonding line, that is, adding pitting and other features to improve the bonding effect of the steel sheet surface in the functional area of ​​the steel sheet surface, which can effectively improve the cavity sealing effect and ensure air tightness.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sealing structure, characterized in that: It includes a cover plate, a cavity shell and a steel plate, wherein the cover plate covers the top of the cavity shell and is sealed with the cavity shell, and the steel plate is arranged at the bottom of the cavity shell; wherein the steel plate is provided with a glue coating portion, the glue coating portion is provided with convex points, the cavity shell is provided with a sealing portion, the sealing portion is stacked on the glue coating portion, and the sealing portion and the glue coating portion are sealed and connected.

2. The sealing structure according to claim 1, characterized in that: The sealing part is sealed and connected with the glue coating part by glue.

3. The sealing structure according to claim 1, characterized in that: A through hole is arranged at the bottom of the cavity shell, and the sealing part is arranged around the periphery of the through hole.

4. The sealing structure according to claim 3, characterized in that: The width d of the glue coating portion satisfies the range of d≥0.5 mm.

5. The sealing structure according to claim 1, characterized in that: A first card slot extending along a first direction is provided on the bottom of the cavity shell, and a first card connection portion extending along the first direction is provided on the steel plate; wherein the first card connection portion is used to be inserted into the first card slot correspondingly so that the cavity shell and the steel plate are card-connected and fixed to each other.

6. The sealing structure according to claim 5, characterized in that: A second card slot extending along a second direction is provided on the bottom of the cavity shell, and a second card connection portion extending along the second direction is provided on the steel plate; wherein the second card connection portion is used to be inserted into the second card slot correspondingly so that the cavity shell and the steel plate are card-connected and fixed to each other.

7. The sealing structure according to claim 6, characterized in that: The first direction is perpendicular to the second direction.

8. The sealing structure according to claim 1, characterized in that: A convex layer is provided on the bottom surface of the cavity shell close to the steel plate, and a hollow portion is provided on the steel plate, wherein the convex layer is used to be correspondingly inserted into the hollow portion so that the cavity shell and the steel plate are clamped and fixed to each other.

9. The sealing structure according to claim 1, characterized in that: It also includes a plurality of air inlets, which are arranged on the cavity shell.

10. The sealing structure according to claim 1, characterized in that: The plurality of air inlets at least include a first air inlet and a second air inlet, and the first air inlet and the second air inlet are arranged on the side wall of the cavity shell at an interval.

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