Device for solving cracking and hemming problems of high-thickness graphite

Abstract

The utility model provides a device for solving cracking and curling of high-thickness graphite. The device comprises a high-thickness graphite body, a single-sided adhesive is adhered to the upper layer of the high-thickness graphite body, and the single-sided adhesive is attached to the upper surface of the high-thickness graphite body; a double-faced adhesive tape is adhered to the lower layer of the high-thickness graphite body, and the double-faced adhesive tape is attached to the lower surface of the high-thickness graphite body; a polyester film is adhered to the outer layer of the double-faced adhesive tape; the edge of the high-thickness graphite body is filled with a sealing edge, and the sealing edge is positioned between the single-sided adhesive and the double-sided adhesive. According to the device for solving the cracking and crimping problems of the high-thickness graphite, the PE foam is adopted to fill the hollow part between the single-sided adhesive and the double-sided adhesive, when the graphite begins to expand, the PE foam expands at the same time, so that the single-sided adhesive and the double-sided adhesive are not influenced by expansion, the crimping and cracking conditions are avoided, and due to the fact that the limitation of edge covering is liberated, the service life of the graphite is prolonged. And the graphite area of the product is larger.

Description

Technical Field

[0001] The utility model relates to the technical field of high-thickness graphite sealing, in particular to a device for solving the problems of cracking and curling of high-thickness graphite. Background Art

[0002] High-density graphite generally refers to a graphite material with a higher density and thickness. It is used in industrial applications to make various seals, gaskets, and other high-temperature and corrosion-resistant components. This graphite material has been specially processed to possess better physical and chemical properties than ordinary graphite, making it suitable for applications under extreme conditions.

[0003] When sealing thick graphite, generally, the sealing edge of 0.2mm thick graphite is 0.8mm, the sealing edge of 0.3mm thick graphite is 1mm, and the sealing edge of 0.4mm thick graphite is 1.2mm.

[0004] In order to increase the heat dissipation area, some products will choose extreme sealing sizes. The thick graphite is squeezed during machine production. If the sealing edge is too low, the product will crack and curl in high temperature weather or after being placed for a long time. Utility Model Content

[0005] The utility model provides a device for solving the problems of cracking and curling of thick graphite, so as to solve the defects in the prior art.

[0006] The utility model provides a device for solving the cracking and curling of thick graphite, comprising: a thick graphite body;

[0007] The upper layer of the thick graphite body is pasted with a single-sided adhesive tape, and the single-sided adhesive tape is adhered to the upper surface of the thick graphite body;

[0008] The lower layer of the thick graphite body is pasted with double-sided tape, and the double-sided tape is adhered to the lower surface of the thick graphite body;

[0009] The outer layer of the double-sided tape is pasted with a polyester film;

[0010] A sealing edge is filled at the edge of the thick graphite body, and the sealing edge is located between the single-sided tape and the double-sided tape.

[0011] Preferably, according to the device for solving the cracking and curling of thick graphite provided by the present invention, the shape of the sealing edge matches the shape of the thick graphite body, and its inner surface fits the edge of the thick graphite body.

[0012] Preferably, according to the device for solving the cracking and curling of thick graphite provided by the present invention, the sealing edge material is selected from PE foam.

[0013] Preferably, according to a device for solving the cracking and curling of thick graphite provided by the utility model, the product formed by laminating the thick graphite body with the single-sided tape, the double-sided tape, the polyester film and other required structures, the total thickness of the product after deducting the thickness of the single-sided tape and the double-sided tape is the thickness of the sealing edge.

[0014] Preferably, according to the device for solving cracking and curling of thick graphite provided by the present invention, the upper and lower surfaces of the sealing edge are respectively adhered to the single-sided tape and the double-sided tape.

[0015] The utility model provides a device for solving the problems of cracking and curling of thick graphite. Since the graphite is compressed after being laminated with a laminating roller on a circular knife machine, the thick graphite after sealing and laminating will be affected under high temperature and long-term storage, causing the graphite in the middle to begin to expand and bulge, resulting in separation of the single-sided tape and the double-sided tape that should be laminated to each other at the sealing edges. The structure uses PE foam to fill the hollow part between the single-sided tape and the double-sided tape. When the graphite begins to expand, the PE foam surface expands at the same time, so that the single-sided tape and the double-sided tape are not affected by the expansion, and curling and cracking will not occur. In addition, since the limitation of the edge wrapping is released, the graphite area of ​​the product can be larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a disassembly diagram of a device for solving the cracking and curling of thick graphite provided by an embodiment of the present utility model;

[0018] Figure 2 The utility model is a cross-sectional schematic diagram of a device for solving the cracking and curling of thick graphite provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as a limitation on the present invention.

[0023] See Figure 1-2 As shown, an embodiment of the present application provides a device for solving the cracking and curling of thick graphite, comprising: a thick graphite body 1;

[0024] The upper layer of the thick graphite body 1 is pasted with a single-sided adhesive tape 2, and the single-sided adhesive tape 2 is adhered to the upper surface of the thick graphite body 1;

[0025] The lower layer of the thick graphite body 1 is pasted with a double-sided tape 3, and the double-sided tape 3 is adhered to the lower surface of the thick graphite body 1;

[0026] The outer layer of the double-sided tape 3 is pasted with a polyester film 4;

[0027] A sealing edge 5 is filled at the edge of the thick graphite body 1 , and the sealing edge 5 is located between the single-sided tape 2 and the double-sided tape 3 .

[0028] In order to further optimize the above technical solution, the shape of the sealing edge 5 matches the shape of the high-thickness graphite body 1 , and its inner surface fits the edge of the high-thickness graphite body 1 .

[0029] In order to further optimize the above technical solution, the material of the sealing edge 5 is selected as PE foam.

[0030] In order to further optimize the above technical solution, a product is formed by laminating the high-thick graphite body 1 to the single-sided tape 2, the double-sided tape 3, the polyester film 4 and other required structures. The total thickness of the product after deducting the thickness of the single-sided tape 2 and the double-sided tape 3 is the thickness of the sealing edge 5.

[0031] In order to further optimize the above technical solution, the upper and lower surfaces of the sealing edge 5 are respectively adhered to the single-sided tape 2 and the double-sided tape 3.

[0032] The principle of filling the sealing edge to prevent thick graphite from splitting, cracking, and curling is as follows:

[0033] Graphite expansion

[0034] Under constant pressure, the length or volume of graphite material changes due to temperature changes. The degree of expansion is expressed by the linear (volumetric) expansion coefficient or expansion rate. The linear expansion coefficient α and the volume expansion coefficient β are defined as:

[0035]

[0036] The expansion rates of length and volume are expressed as Δl / l and ΔV / V, respectively. T is temperature, p is pressure, and l and V are the length and volume of the specimen, respectively. α and β are sometimes called true expansion coefficients to distinguish them from the average expansion coefficients. When the temperature rises from T1 to T2, the length of an object changes from l1 to l2, and its volume changes from V1 to V2. The average linear expansion coefficient α and average volume expansion coefficient β are expressed as follows:

[0037]

[0038] Greeneisen's Theory of Thermal Expansion of Graphite: Thermal expansion of a solid is an increase in the average distance between adjacent atoms. The potential energy U between two adjacent atoms in a crystal is a function of the distance r between their nuclei. The potential energy curve U-r is an asymmetric curve, showing that the atomic distance increases with increasing vibrational energy. Because resonance does not change the average distance between atoms, strictly speaking, the distance should increase with increasing anharmonic vibrations. This is the starting point of Greeneisen's theory of thermal expansion. At a certain vibrational energy, the distance between two atoms varies around the equilibrium position. Due to the asymmetry of the potential energy curve, the average distance r is greater than the equilibrium distance r0. At higher vibrational energies, the average distance is even greater. As vibrational energy increases with increasing temperature, the average distance between two atoms also increases, resulting in expansion. As a crystal expands, its elastic energy increases, and the lattice vibration frequency decreases. The Greeneisen constant γ is often used to describe the variation of frequency ω with volume V.

[0039]

[0040] Based on the fact that the equilibrium volume is the volume with the minimum free energy, Greeneisen believed that the vibration frequency of all lattice points has roughly the same dependence on volume, that is, γ is a constant. For isotropic crystals, such as cubic crystals, the following relationship was derived:

[0041]

[0042] Where β is the crystal expansion coefficient; K is the bulk modulus; CV is the molar constant volume specific heat capacity; and V is the molar volume.

[0043] This relationship is sometimes called the Grüneisen equation or law. It states that the thermal expansion of a crystal is directly proportional to its specific heat capacity and inversely proportional to its elastic modulus. Since the specific heat capacity is zero at absolute zero, the thermal expansion should also be zero at absolute zero.

[0044] The utility model provides a device for solving the problems of cracking and curling of thick graphite. Since the graphite is compressed after being laminated with a laminating roller on a circular knife machine, the thick graphite after sealing and laminating will be affected under high temperature and long-term storage, causing the graphite in the middle to begin to expand and bulge, resulting in separation of the single-sided tape and the double-sided tape that should be laminated to each other at the sealing edges. The structure uses PE foam to fill the hollow part between the single-sided tape and the double-sided tape. When the graphite begins to expand, the PE foam surface expands at the same time, so that the single-sided tape and the double-sided tape are not affected by the expansion, and curling and cracking will not occur. In addition, the limitation of the edge wrapping is liberated, and the graphite area of ​​the product can be larger.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for solving the cracking and curling of thick graphite, characterized in that: include: High-thick graphite body; The upper layer of the thick graphite body is pasted with a single-sided adhesive tape, and the single-sided adhesive tape is adhered to the upper surface of the thick graphite body; The lower layer of the thick graphite body is pasted with double-sided tape, and the double-sided tape is adhered to the lower surface of the thick graphite body; The outer layer of the double-sided tape is pasted with a polyester film; A sealing edge is filled at the edge of the thick graphite body, and the sealing edge is located between the single-sided tape and the double-sided tape.

2. The device for solving the cracking and curling of thick graphite according to claim 1, characterized in that: The shape of the sealing edge matches the shape of the high-thick graphite body, and the inner surface thereof fits the edge of the high-thick graphite body.

3. The device for solving the cracking and curling of thick graphite according to claim 1, characterized in that: The sealing edge material is PE foam.

4. The device for solving the cracking and curling of thick graphite according to claim 1, characterized in that: The product formed by laminating the high-thick graphite body with the single-sided tape, the double-sided tape, the polyester film and other required structures has a total thickness equal to the thickness of the sealing edge after deducting the thickness of the single-sided tape and the double-sided tape.

5. The device for solving the cracking and curling of thick graphite according to claim 1, characterized in that: The upper and lower surfaces of the sealing edge are respectively adhered to the single-sided tape and the double-sided tape.

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