CN219730822U - Solid adhesive for gaps between sheet metal parts - Google Patents
Solid adhesive for gaps between sheet metal parts Download PDFInfo
- Publication number
- CN219730822U CN219730822U CN202321350034.4U CN202321350034U CN219730822U CN 219730822 U CN219730822 U CN 219730822U CN 202321350034 U CN202321350034 U CN 202321350034U CN 219730822 U CN219730822 U CN 219730822U
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- adhesive layer
- expansion
- adhesive
- solid
- sheet metal
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 93
- 239000000853 adhesive Substances 0.000 title claims abstract description 92
- 239000007787 solid Substances 0.000 title claims abstract description 73
- 239000002184 metal Substances 0.000 title claims abstract description 34
- 239000012790 adhesive layer Substances 0.000 claims abstract description 109
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 49
- 238000005187 foaming Methods 0.000 claims abstract description 32
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 230000008961 swelling Effects 0.000 description 8
- 238000010008 shearing Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000011837 pasties Nutrition 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The utility model relates to the technical field of adhesives, in particular to a solid adhesive for gaps between sheet metal parts, which comprises a first non-expansion adhesive layer, a foaming adhesive layer and a second non-expansion adhesive layer which are stacked from top to bottom, wherein the volume of the first non-expansion adhesive layer and the volume of the second non-expansion adhesive layer are unchanged after the first non-expansion adhesive layer and the second non-expansion adhesive layer are solidified, and the volume of the foaming adhesive layer is increased after the foaming adhesive layer is solidified; the high-strength foam-type adhesive layer is characterized by further comprising wavy reinforcing wires, the length direction of the reinforcing wires is parallel to the first non-expansion type adhesive layer, the height direction of the reinforcing wires is from the first non-expansion type adhesive layer to the second non-expansion type adhesive layer, the reinforcing wires penetrate through the foam-type adhesive layer along the height direction, the upper parts of the reinforcing wires are connected with the first non-expansion type adhesive layer, and the lower parts of the reinforcing wires are connected with the second non-expansion type adhesive layer. The method can solve the problems that the existing solid adhesive is likely to not completely fill gaps after being cured and the bonding effect is poor.
Description
Technical Field
The utility model relates to the technical field of adhesives, in particular to a solid adhesive for gaps between sheet metal parts.
Background
In the automotive industry, adhesives are widely used. The adhesive is a substance with good adhesive property, and has the function of connecting objects through adhesive force and cohesive force, and in the process of automobile production, the adhesive connection can partially replace welding connection so as to realize the functions of connection, sealing or shock absorption between parts. At present, adhesives are classified into two types according to their state before being cured at normal temperature, one type being pasty and one type being solid. The paste adhesive is stored in an extrusion pipe or a barrel tank, and is extruded to a position to be bonded when in use; the solid adhesive has a fixed shape, is generally made into a particle shape, a strip shape, a coiled material shape and the like, and is placed at a position to be bonded when in use. Whether in paste or solid form, it is necessary to cure it after it is placed in a position where it is to be bonded, so that it will exert its bonding effect.
Because the pasty adhesive has certain fluidity, the characteristic of fluidity after the pasty adhesive is extruded into a plurality of gaps can be well attached to the parts to be bonded, and the bonding effect after curing is better. However, in actual production, some spaces of positions to be bonded are very small, and the extrusion nozzle of the paste adhesive has a certain thickness, so that the extrusion nozzle cannot extend to the positions to be bonded; or the structure of the position to be bonded is complex, and the extrusion nozzle is blocked by the automobile part and cannot extend to the position to be bonded. In order to solve the above problems, the solid adhesive is adopted, and the solid adhesive is pushed or plugged into the position to be bonded after being placed near the position to be bonded when being arranged, for example, when the adhesive is required to be arranged in a gap between two sheet metal parts, and the gap is deeper, the solid adhesive is a better choice. However, this also causes a new problem, such as when used in the gap between the two sheet metal parts, in order to allow the solid adhesive to reach the deepest part of the gap, the thickness of the solid adhesive needs to be smaller than that of the gap, otherwise, the solid adhesive is difficult to insert, and the solid adhesive may not completely fill the gap after curing due to insufficient fluidity, resulting in poor bonding effect. For this reason, it is necessary to develop a novel solid adhesive to solve the above problems.
Disclosure of Invention
The utility model aims to provide a solid adhesive for gaps between sheet metal parts, and aims to solve the problem that the existing solid adhesive can not completely fill the gaps after being solidified, so that the bonding effect is poor.
In order to achieve the above-mentioned purpose, the utility model provides a solid adhesive for a gap between sheet metal parts, which comprises a first non-expansion type adhesive layer, a foaming type adhesive layer and a second non-expansion type adhesive layer which are laminated from top to bottom, wherein the volume of the first non-expansion type adhesive layer and the volume of the second non-expansion type adhesive layer are unchanged after the first non-expansion type adhesive layer and the second non-expansion type adhesive layer are solidified, and the volume of the foaming type adhesive layer is increased after the foaming type adhesive layer is solidified; the high-strength foam-type adhesive layer is characterized by further comprising wavy reinforcing wires, the length direction of the reinforcing wires is parallel to the first non-expansion type adhesive layer, the height direction of the reinforcing wires is from the first non-expansion type adhesive layer to the second non-expansion type adhesive layer, the reinforcing wires penetrate through the foam-type adhesive layer along the height direction, the upper parts of the reinforcing wires are connected with the first non-expansion type adhesive layer, and the lower parts of the reinforcing wires are connected with the second non-expansion type adhesive layer.
Further, the thickness of the first non-expansion type adhesive layer is consistent with that of the second non-expansion type adhesive layer, and the thickness of the foaming type adhesive layer is 40% -70% of that of the solid adhesive.
Further, the expansion coefficient of the foaming adhesive layer after curing is 1.05-1.3.
Further, anchor points with the cross section larger than that of the self-filament sections of the reinforcing wires are arranged at the positions where the reinforcing wires are connected with the first non-expansion type adhesive layer and the second non-expansion type adhesive layer.
Further, the solid adhesive is in the form of a roll.
Further, the length direction of the reinforcing filaments is aligned with the length direction of the coiled solid adhesive.
Further, at least three rows of reinforcing filaments are provided in the width direction of the coiled solid adhesive.
Further, the reinforcing filaments are glass fiber filaments.
Compared with the prior art, the solid adhesive for the gaps between the sheet metal parts provided by the utility model has the advantages that the traditional non-expansion adhesive and the foaming adhesive are laminated and compounded, and the purpose of filling the gaps is achieved after the foaming adhesive layer is expanded during solidification; meanwhile, the distance between the first non-expansion type adhesive layer and the second non-expansion type adhesive layer is increased and extruded to the sheet metal part, so that the first non-expansion type adhesive layer and the second non-expansion type adhesive layer are respectively adhered to the sheet metal part, and the adhesion is firm; the reinforcing filaments provided between the first non-swelling adhesive layer and the second non-swelling adhesive layer can improve the shearing resistance and have high strength. Therefore, the solid adhesive for the gap between the sheet metal parts can solve the problems that the existing solid adhesive can not completely fill the gap after being cured, the bonding effect is poor, and each performance is good.
Drawings
FIG. 1 is a front cross-sectional view of a solid adhesive for a gap between sheet metal parts of the present utility model;
FIG. 2 is a top structural view of the solid adhesive for the gap between sheet metal parts of the present utility model;
fig. 3 is a partial enlarged view at a of fig. 1.
Reference numerals illustrate:
1. a first non-intumescent adhesive layer; 2. a foaming type adhesive layer; 3. a second non-intumescent adhesive layer; 4. reinforcing wires; 41. and (5) an anchor point.
Detailed Description
The present utility model will be described in detail with reference to specific examples.
In the present utility model, unless explicitly stated and limited otherwise, when terminology such as "disposed," "connected," or "connected" is intended to be interpreted broadly, such as, for example, a fixed connection, a removable connection, or an integral connection; may be directly connected or connected through one or more intermediaries. The specific meaning of the terms described above in the present utility model can be understood by those skilled in the art according to the specific circumstances. The direction words appearing in the utility model are used for better explaining the characteristics of the features and the relation among the features, and it is understood that when the arrangement direction of the utility model is changed, the characteristics of the features and the directions of the relation among the features are correspondingly changed, so that the direction words do not form absolute limiting effect on the characteristics of the features and the relation among the features in space, and only play a role in relative limiting.
The utility model provides a solid adhesive for gaps between sheet metal parts, which is shown in figures 1 to 3, and comprises a first non-expansion type adhesive layer 1, a foaming type adhesive layer 2 and a second non-expansion type adhesive layer 3 which are stacked from top to bottom, wherein the volume of the first non-expansion type adhesive layer 1 and the volume of the second non-expansion type adhesive layer 3 are unchanged after the first non-expansion type adhesive layer 1 and the second non-expansion type adhesive layer 3 are solidified, and the volume of the foaming type adhesive layer 2 is increased after the first non-expansion type adhesive layer and the second non-expansion type adhesive layer are solidified; the adhesive further comprises wavy reinforcing wires 4, the length direction of the reinforcing wires 4 is parallel to the first non-expansion type adhesive layer 1, the height direction of the reinforcing wires 4 is from the first non-expansion type adhesive layer 1 to the second non-expansion type adhesive layer 3, the reinforcing wires 4 penetrate through the foaming type adhesive layer 2 along the height direction, the upper parts of the reinforcing wires 4 are connected with the first non-expansion type adhesive layer 1, and the lower parts of the reinforcing wires 4 are connected with the second non-expansion type adhesive layer 3.
When the foaming adhesive layer 2 is solidified and expanded, since the reinforcing wire 4 is wave-shaped, the reinforcing wire 4 can be stretched along the height direction of the solid adhesive and deformed following the deformation of the foaming adhesive layer 2, and the adhesive is again wrapped around the reinforcing wire 4 after the solidification is completed. Preferably, the first non-expansion type adhesive layer 1 and the second non-expansion type adhesive layer 3 in this embodiment are made of a solid non-expansion type adhesive in the prior art, and the foaming type adhesive layer 2 in this embodiment is made of a solid foaming type adhesive in the prior art, and the expansion coefficient thereof may satisfy 1.05-1.3 defined in this embodiment.
Based on the structure, the foaming type adhesive layer 2 is arranged, and the solid adhesive with the original thickness smaller than the thickness of the gap between the sheet metal parts is selected so that the solid adhesive can be plugged into the gap; the foaming adhesive layer 2 is expanded during solidification to achieve the purpose of filling gaps; meanwhile, the distance between the first non-expansion type adhesive layer 1 and the second non-expansion type adhesive layer 3 is increased and extruded to the sheet metal part, so that the first non-expansion type adhesive layer 1 and the second non-expansion type adhesive layer 3 are respectively adhered to the sheet metal part, and the adhesion is firm; the reinforcing filaments 4 provided between the first non-swelling adhesive layer 1 and the second non-swelling adhesive layer 3 can improve the shearing resistance after curing, and have high strength.
In this embodiment, the thickness of the first non-swelling adhesive layer 1 is identical to the thickness of the second non-swelling adhesive layer 3, and the thickness of the foaming adhesive layer 2 is 40% -70%, preferably 50%, of the thickness of the solid adhesive. Preferably, the expansion coefficient of the foamed adhesive layer 2 after curing is 1.05 to 1.3, preferably 1.2. With the preferred arrangement described above, the solid adhesive can be cured to an increase in thickness of about 10%. Of course, other values within the above range can be used for the above thickness ratio and expansion coefficient, and different types of products can be selected according to specific situations when facing the gaps with different thicknesses.
In this embodiment, as shown in fig. 1 and 3, anchor points 41 with a section larger than that of the self-filament section of the reinforcing wire 4 are provided at the positions where the reinforcing wire 4 is connected to the first non-swelling adhesive layer 1 and the second non-swelling adhesive layer 3. The anchor point 41 can increase the contact surface, so that the connection between the reinforcing wire 4 and the first non-expansion adhesive layer 1 and the second non-expansion adhesive layer 3 is not easy to break away. Preferably, the reinforcing filaments 4 are glass fiber filaments; the glass fiber yarn is easy to obtain and cheap in material and high in strength, and the anchor point 41 can be formed by means of scalding or equidistantly knotting, so that the manufacturing is convenient.
In this embodiment, the solid adhesive is in the form of a roll. Preferably, the length direction of the reinforcing filaments 4 coincides with the length direction of the coiled solid adhesive. It is further preferable that at least three rows of reinforcing filaments 4 are provided in the width direction of the web-like solid adhesive. Based on the above structure, the solid adhesive of the whole roll is conveniently produced, the length is cut according to the requirement when in use, and the strength of the solid adhesive can be better improved due to the arrangement of the three rows of reinforcing wires 4.
The following table is performance test data for the solid state adhesive for gap between sheet metal parts, the solid state non-intumescent adhesive of the prior art, and the solid state foamable adhesive of the prior art (having an expansion coefficient of 1.2) of this example, and the gap thickness between sheet metal parts tested was 1mm. In the present embodiment of the present utility model, the thickness of the foaming adhesive layer 2 is 50% of the thickness of the solid adhesive; the material of the foaming adhesive layer 2 is the solid foaming adhesive in the prior art, and the expansion coefficient after curing is 1.2; the materials of the first non-expansion type adhesive layer 1 and the second non-expansion type adhesive layer 3 are the solid non-expansion type adhesives of the prior art.
As can be seen from the table, the solid adhesive for the gap between the sheet metal parts has a foaming effect locally, so that the volume of the solid adhesive is increased after solidification to fill the gap; the non-expansion adhesive layer is contacted with the sheet metal part, so that the T-shaped peeling strength between the whole solid adhesive and the sheet metal part can reach the level of the traditional solid non-expansion adhesive, the solid adhesive is not easy to separate from the sheet metal part, and the T-shaped peeling strength is high; the middle of the solid adhesive is the foaming adhesive layer 2, so that the shearing adhesive strength of the solid adhesive is lower than that of the traditional solid non-expansion adhesive, but the reinforcing wires 4 are additionally arranged in the solid adhesive, so that the shearing adhesive strength of the solid adhesive can be improved by the reinforcing wires 4, and the shearing adhesive strength of the solid adhesive can basically reach the level of the traditional solid non-expansion adhesive.
In summary, the solid adhesive for gaps between sheet metal parts provided by the utility model can well fill the gaps between sheet metal parts, and has better shearing bonding strength and T-shaped peeling strength than the traditional solid foaming adhesive, and better use effect.
The above-described embodiments and features of the embodiments may be combined with each other without conflict.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (8)
1. The solid adhesive for the gap between the sheet metal parts is characterized in that: the adhesive comprises a first non-expansion type adhesive layer (1), a foaming type adhesive layer (2) and a second non-expansion type adhesive layer (3) which are stacked from top to bottom, wherein the volume of the first non-expansion type adhesive layer (1) and the volume of the second non-expansion type adhesive layer (3) are unchanged after solidification, and the volume of the foaming type adhesive layer (2) is increased after solidification;
the adhesive further comprises wavy reinforcing wires (4), the length direction of the reinforcing wires (4) is parallel to the first non-expansion adhesive layer (1), the height direction of the reinforcing wires (4) is from the first non-expansion adhesive layer (1) to the second non-expansion adhesive layer (3), the reinforcing wires (4) penetrate through the foaming adhesive layer (2) along the height direction, the upper parts of the reinforcing wires (4) are connected with the first non-expansion adhesive layer (1), and the lower parts of the reinforcing wires (4) are connected with the second non-expansion adhesive layer (3).
2. The solid state adhesive for a gap between sheet metal parts of claim 1, wherein: the thickness of the first non-expansion type adhesive layer (1) is consistent with that of the second non-expansion type adhesive layer (3), and the thickness of the foaming type adhesive layer (2) is 40% -70% of that of the solid adhesive.
3. The solid state adhesive for a gap between sheet metal parts of claim 2, wherein: the expansion coefficient of the foaming adhesive layer (2) after solidification is 1.05-1.3.
4. The solid state adhesive for a gap between sheet metal parts of claim 1, wherein: the positions where the reinforcing wires (4) are connected with the first non-expansion type adhesive layer (1) and the second non-expansion type adhesive layer (3) are respectively provided with an anchor point (41) with the cross section larger than that of the self-filament section of the reinforcing wires (4).
5. The solid state adhesive for a gap between sheet metal parts of claim 1, wherein: the solid adhesive is coiled.
6. The solid state adhesive for a gap between sheet metal parts of claim 5, wherein: the length direction of the reinforcing wire (4) is identical to the length direction of the coiled solid adhesive.
7. The solid state adhesive for a gap between sheet metal parts of claim 5, wherein: at least three rows of reinforcing filaments (4) are arranged in the width direction of the coiled solid adhesive.
8. The solid state adhesive for a gap between sheet metal parts according to any one of claims 1 to 7, wherein: the reinforcing filaments (4) are glass fiber filaments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350034.4U CN219730822U (en) | 2023-05-31 | 2023-05-31 | Solid adhesive for gaps between sheet metal parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350034.4U CN219730822U (en) | 2023-05-31 | 2023-05-31 | Solid adhesive for gaps between sheet metal parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219730822U true CN219730822U (en) | 2023-09-22 |
Family
ID=88056580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321350034.4U Active CN219730822U (en) | 2023-05-31 | 2023-05-31 | Solid adhesive for gaps between sheet metal parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219730822U (en) |
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2023
- 2023-05-31 CN CN202321350034.4U patent/CN219730822U/en active Active
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